1. Substances are given: Fe 2 O 3, Fe, solutions of CaCl 2, ZnSO 4, H 2 SO 4 , NaOH. Using water and the necessary substances only from this list, get iron (II) hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviation ionic equation.
2. Substances are given: Fe, CuO, solutions H 2 O 2, CuSO 4, H 2 SO 4 , NaOH. Using water and the necessary substances only from this list, get iron (II) hydroxide in two stages. Describe the signs of the reactions being carried out. For the first reaction, write the abbreviated ionic equation.
3. For the experiment, the following reagents were proposed: zinc granules, zinc sulfate, solutions of magnesium chloride, calcium nitrate, sulfuric acid, sodium hydroxide.

It is required to obtain zinc sulfate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: zinc oxide, zinc sulfate, solutions of barium chloride, copper (II) nitrate, hydrogen peroxide, silver (I) nitrate.

1. Substances given: FeSO 4, FeS, Ca (OH) 2, HCl, H 2 O 2, CuSO 4 * 5H 2 A. Using water and the necessary substances only from this list, get copper (II) sulfide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
2. Substances given: Al, ZnSO 4 * 7H 2 O, solutions of CaCl 2, HNO 3, H 2 O 2 , NaOH. Using water and the necessary substances only from this list, get aluminum nitrate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.

1. Given substances: KCl, MnO 2 , MgO, KOH, HCl, Zn. Using water and the necessary substances only from this list, get potassium chlorate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
2. Substances given: CaCO 3, CuO, solutions of HNO 3, K 2 SO 4, NaOH, H 2 O 2 ... Using water and the necessary substances only from this list, get copper (II) hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
3. 3) 2, ZnO, ZnCl 2, H 2 SO 4, MgSO 4 , KOH. Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
4. Substances are given: H 2 SO 4, H 2 O 2, Mg 3 (PO 4) 2, Cu (OH) 2, MgCO 3 , KOH. Using water and the necessary substances only from this list, get magnesium hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
5. Substances given: Mg, AlCl 3, CuS, solutions H 2 SO 4, HNO 3 , NaOH. Using water and the necessary substances only from this list, get aluminum oxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
6. Substances are given: solutions of Cu (NO
7. Substances given: FeSO 4, Fe 2 O 3, NH 3 (aqueous solution), Zn (OH) 2, AgNO 3 , HCl. Using water and the necessary substances only from this list, get iron (III) hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
8. Substances given: CuSO 4 * 5H 2 O, Cu, KMnO 4, H 2 SO 4, Na 2 SO 4, CaCl 2 ... Using water and the necessary substances only from this list, get potassium sulfate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
9. Substances given: Cu, ZnO, CaCO 3, FeCl 2 solutions , HCl, NaOH. Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
10. Substances given: FeSO 4, HCl, ZnSO 4, Al 2 (SO 4) 3, H 2 O 2 , NaOH. Using water and the necessary substances only from this list, get iron (III) hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
11. Substance given: Na 2 SO 4, ZnS, Ca (OH) 2, HCl, H 2 O 2, (CuOH) 2 CO 3
12. Substances given: NaOH, CaO, CuO, Na 2 CO 3, Na 2 SO 3, AgNO 3 ... Using water and the necessary substances only from this list, get calcium carbonate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
13. Substances given: Zn, FeSO 4 * 7H 2 O, solutions of MgCl 2, H 2 SO 4, Ca (NO 3) 2 , NaOH. Using water and the necessary substances only from this list, get zinc sulfate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
14. Substances given: AlCl 3, CuSO 4 * 5H 2 O, Ba (NO 3) 2, HCl, H 2 O 2 , Al. Using water and the necessary substances only from this list, get aluminum nitrate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
15. Substance given: Na 2 S, Ca (OH) 2, CaSO 4, Na 2 SO 3, H 2 SO 4, H 2 O 2 ... Using water and the necessary substances only from this list, get manganese (II) sulfate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.

1. Substances are given: solutions of Cu (NO 3) 2, H 2 SO 4, ZnCl 2, KNO 3, MgSO 4 , KOH. Using water and the necessary substances only from this list, get magnesium oxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
2. Substances given: ZnO, Zn, MgSO solutions 4, H 2 SO 4, AgNO 3, Ba (NO 3) 2 ... Using water and the necessary substances only from this list, get zinc nitrate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
3. Substances given: FeCl 2, CuS, solutions of H 2 SO 4, HNO 3, NaOH, H 2 O 2 ... Using water and the necessary substances only from this list, get iron (II) nitrate in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.
4. The following reagents were proposed for the experiment: nitric acid (solution), iron (II) and (III) nitrates, barium sulfate, hydrochloric acid, sodium hydroxide.

It is required to obtain iron (III) chloride as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: zinc, copper sulfate, solutions of calcium and sodium chlorides, barium nitrate and sodium hydroxide.

It is required to obtain zinc hydroxide as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: nitric acid (solution), hydrogen sulfide water, barium orthophosphate, aluminum hydroxide, potassium orthophosphate, sodium hydroxide.

It is required to obtain aluminum phosphate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: zinc, iron (III) chloride, calcium chloride solutions, nitric acid s, barium nitrate and caustic soda.

It is required to obtain zinc nitrate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. The following reagents were proposed for the experiment: zinc, zinc phosphate, solutions of sodium hydroxide, copper (II) sulfate, barium and silver (I) nitrates.

It is required to obtain zinc nitrate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: barium chloride, iron (II) sulfate, solutions of sodium hydroxide, sulfuric acid, hydrogen peroxide, pyrite.

It is required to obtain iron (III) hydroxide as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: iron (II) oxide, iron, solutions of magnesium sulfate, copper (II) chloride, silver (I) nitrate, barium nitrate.

1. For the experiment, the following reagents were proposed: hydrochloric acid, ammonium chloride, solutions of sulfuric and nitric acids, caustic soda and sodium nitrite.

It is required to obtain ammonium nitrate as a result of two consecutive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: aluminum chloride, magnesium, copper (II) sulfide, solutions of sulfuric and nitric acids, sodium hydroxide.

It is required to obtain sodium tetrahydroxoaluminate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

1. For the experiment, the following reagents were proposed: iron, iron (II) sulfide, solutions of copper (II) chloride, barium and silver nitrates, sodium hydroxide.

It is required to obtain iron (II) nitrate as a result of two successive reactions. Select the reagents required for this from among those offered to you. Make a diagram of the transformations, as a result of which the indicated substance can be obtained. Write down the equations for the two reactions. For the ion exchange reaction, write an abbreviated ionic equation.

Test tasks.Question 22.9 grade. OGE.

1. Given substances: ZnO, Zn, CuS 0 4 , H 2 0, solutions CaCl 2 , NaCl, NaOH, Ba(N 0 3 ) 2 . Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.

The following substances are given:H 2 S 0 4, H 2 0 2, Mg 3 (P 0 4) 2, Cu (OH) 2, Mg C0 3 , CON. Using water and the necessary substances only from this list, get magnesium hydroxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, sew on the abbreviated ionic reaction equation.

Substances are given: Mg, A1C1 3, CuS, solutions H 2 S 0 4 , HN 0 3 , NaOH. Using water and the necessary substances only from this list, you will getv two stages aluminum oxide. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances given: solutionsCu(N 0 3 ) 2 , H 2 S 0 4 , ZnCl 2 , KN 0 3 , MgS 0 4 , KOH. Using water and the necessary substances only from this list, get magnesium oxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

The following substances are given:FeS 0 4 , Fe 2 0 3 , N H 3 (water solution),Zn(OH)„ AgN 0 3 , HC1.III). Describe the signs of the reactions being carried out. For the ion exchange reaction, write the abbreviated ionic equation.

Substances are given: A 1 2 (S 0 4 ) 3 , Zn, solutions Н 2 0 2, H 2 S 0 4 , HN 0 3 , NaHE. Using water and the necessary substances only from thiscsqueak, get aluminum nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: CuS 0 4 × 5 H, 0, C, KMn 0 4 , H 2 S 0 4 , Na 2 S 0 4, CaCl 2 ... Using water and the necessary substances only from this list, get potassium sulfate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

The following substances are given:HN 0 3 (solution), H 2 S(rr), Ba 3 (PO 4) 2, A1 (0H) 3, K 3 PO 4, NaOH... Using water and the necessary substances only from this list, get aluminum phosphate in two stages. Describe the signs of the reactions being carried out. For the second reaction, write the abbreviated ionic reaction equation.

Substances are given: Al, ZnS 0 4 × 7 H 2 0, solutions CaCl 2 , HNO 3, H 2 0 2, NaOH.

Substances are given: KS1,Mn 0 2 , MgO, KOH, HCl, Zn... Using water and the necessary substances only from this list, get potassium chlorate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: CaC0 3, CuO, solutions HNO 3, K 2 SO 4 , NaOH, H 2 O 2 .

Using water and the necessary substances only from this list, get copper hydroxide in two stages (II

Substances given: solutionsCuCl 2, HC1, ZnSO 4 , NaNO 3 , NaOH. Using water and the necessary substances only from this list, get zinc chloride in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Zn, NaOH, CaC 2 solutions, ZnSO 4 , H 2 O 2 , Ba(N 0 3 ) 2 . Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: ammonia,NaOH, H 2 S 0 4, HC1, Ba(N 0 3 ) 2 , KN 0 3 .

Substances are given: Mg, A 1 2 (S 0 4 ) 3 , CuS, HC1 solutions, HN 0 3 , NaOH. Using water and the necessary substances only from this list, get aluminum nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: ZnO, Zn, solutions MgCl 2 , BaS 0 4 , Cu(N 0 3 ) 2 , NaOH. Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Fe 2 0 3 , Fe, solutions MgS 0 4 , H 2 S 0 4 , AgN 0 3, B a(N 0 3 ) 2. II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Fe, CuS 0 4 × 5 H 2 0, solutions H 2 0 2, MgCl 2, HC1, NaOH. Using water and the necessary substances only from this. disk, get copper chloride (H) in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: A1C1 3 , CuS 0 4 -5 H 2 0, Ba(N 0 3) 2, НС1, Н 2 0 2, Al. Using water and the necessary substances only from this list, get aluminum nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: CuS 0 4 × 5 H 2 0, Si, Ca (OH) 2, H 2 S 0 4, H 2 0 2, CaS 0 4 × 2 H 2 0. Using water and the necessary substances only from this list, get calcium sulfite in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Na 2 S 0 4 , Zn, Ca (OH) 2, H 2 S 0 4, H 2 O 2, CuSO 4 × 5 H 2 0. Using water and necessary substances onlyfromof this list, get in two stages sulphur dioxide... Describesignsconducted reactions. For the ion exchange reaction, write the abbreviated ionic equation.

Substances are given: ZnCl 2 , ZnO, solutions H 2 S 0 4 , K 2 C 0 3 , NaO H, H 2 0 2 ... Using water and the necessary substances only from this list, get zinc hydroxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances given: solutionsCu(N 0 3 ) 2 , HN 0 3 , ZnCl 2, HC l, MgS 0 4 , KOH. Using water and the necessary substances only from this list, get magnesium chloride in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Fe, Si, FeCl 3 , H 2 S 0 4, KS1, NaOH. Using water and the necessary substances only from this list, get two stages of copper hydroxide (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

The following substances are given:Fe, FeS, CuCl 2 , Ba(N 0 3 ) 2 , AgNO 3 , NaOH. Using water and the necessary substances only from this list, get iron nitrate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: Mg, A 1 CI 3 , CuS, solutions H 2 S 0 4 , HNO 3 , NaOH. Using water and the necessary substances only from this list, get sodium tetrahydroxoaluminate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe2 0 3 , Fe, solutionsMgCl2 , BaS0 4 , CuS0 4 , NaOH. Using water and the necessary substances only from this list, get iron hydroxide in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe, CuS0 4 × 5H2 0, solutions H2 0 2 , Fe(N0 3 ) 2 , HN0 3 , NaOH. II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:HCl(p- p), NH 4 CI, HN0 3 , H 2 S0 4 , NaOH, NaNO 2 , Using water and the necessary substances only from this list, get ammonium nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:FeO, Fe, solutionsMgS0 4 , CuCl 2 , AgN0 3 , Ba(N0 3 ) r Using water and the necessary substances only from this list, get iron nitrate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Na 2 SO 4 , ZnS, Ca (OH) 2 , HC1, H 2 0 2 , (WITHu0H) 2 C0 3 ... Using water and the necessary substances only from this list, get calcium carbonate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Na 2 S0 4 , NaCl, Ca (OH) 2 , HC1, H 2 0 2 , AgN0 3 . Using water and the necessary substances only from this list, you will get oxygen in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe, FeS0 4 × 7H 2 0, solutions H 2 0 2 , WITHuC1 2 , NSl, NaOH. II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: ВаС1 2 , FeS0 4 , NaOH, H 2 S0 4 , N 2 0 2 , FeS . Using water and the necessary substances only from this list, get iron hydroxide in two stages (III). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe 2 0 3 , Fe, CaCl solutions 2 , ZnS0 4 , H 2 SO 4, NaOH. Using water and the necessary substances only from this list, get iron hydroxide in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:ZnO, ZnS0 4 × 7H 2 0, BaC1 solutions 2 , Cu(N0 3 ) 2 , N 2 0 2 , AgN0 3 .

Substances given: solutionsCuCl 2 , HN0 3 , ZnS0 4 , NaN0 3 , NSl, NaOH. Using water and the necessary substances only from this list, get copper nitrate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

The following substances are given:Zn, Zn 3 (P0 4 ) 2 , CuS0 4 , Ba(N0 3 ) 2, AgN0 3 , NaOH. Using water and necessary substances only

Substances are given:Na 2 S, Ca (OH) 2 , CaS0 4 , Na 2 S0 3 , H 2 S0 4 , KMn0 4 . Using water and the necessary substances only from this list, get manganese sulfate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Mg, CuCl 2 , CuS, solutionsH 2 S0 4 , HN0 3 , NaOH. Using water and the necessary substances only from this list, get copper sulfate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:FeO, Fe, solutionsMgS0 4 , HC1,AgN0 3 , Ba(N0 3 ) 2 . Using water and the necessary substances only from this list, get iron nitrate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Na 2 S0 4 , Mg, Ca (OH) 2 , HC1, H 2 0 2 , NaN0 3 . Using water and the necessary substances only from this list, get magnesium hydroxide in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe, CuO, CuS, solutionsZnCl 2 , HC1,NaOH. II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances given: solutionsFeS0 4 , HC1,ZnS0 4 , Fe(N0 3 ) 3 , MgS0 4 , NaOH. Using water and the necessary substances only from this list, get ferric chloride in two stages (III). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

The following substances are given:Zn, Zn 3 (P0 4 ) 2 , CuCl 2 , BaC1 2 , AgN0 3 , NaOH. Using water and necessary substancesfrom this list, get zinc nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:FeCl 2 , CuS, solutionsH 2 S0 4 , HNO 3 , NaOH, N 2 O 2 ... Using water and the necessary substances only from this list, you will get ferrous sulfate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Zn, FeS0 4 × 7H 2 0, solutionsMgCl 2 , H 2 SO 4 , Ca(N0 3 ) 2 , NaOH. Using water and the necessary substances only from this list, get zinc sulfate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Fe, FeS0 4 × 7H 2 0, solutions H 2 O 2, Cu(NO 3 ) 2 , HN0 3 , NaOH. Using water and the necessary substances only from this list, get iron nitrate in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:Na 2 SO 4 , ZnS, Ca (OH) 2 , HC1, H 2 0 2 , WITHuSO 4 × 5H 2 O... Using water and the necessary substances only from this list, get copper sulfide in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given:CuSO 4 × 5H 2 O,Zn, BaC solutionsl 2 , Ca(NO 3 ) 2 , N 2 0 2 , Ba(N0 3 ) 2 . Using water and necessary substancesonlyfrom this list, get zinc nitrate in two stages. Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances given: solutionsCuCl 2 , HC1,ZnSO 4 . Fe(NO 3 ) 3, MgS0 4 , NaOH. Using water and the necessary substances only from this list, get iron oxide in two stages (III). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Given substances: Cu, Ca,MgS0 4 , HN0 3 , AgN0 3 , NaOH. Using water and the necessary substances only from this list, get copper hydroxide in two stages (II). Describe the signs of the reactions being carried out. For an ion exchange reaction, write the abbreviated ionic reaction equation.

Substances are given: FeCl 2, CuS, solutions of H 2 SO 4, HNO 3, NaOH, H 2 O 2. Using water and the necessary substances only from this list, get iron (II) nitrate in two stages. Describe the signs ...

Task 22 refers to the final part of the OGE in chemistry. It is practical and provides for the conduct of experiments and reactions, as well as the correct recording of what is happening on a special form designed for a detailed answer.

Peculiarities

As practice shows, this type requires not so much deep theoretical knowledge how much caution, attentiveness, skills and experience in working with chemical elements. At the same time, question No. 22 is classified as a higher level of complexity and is variable in content depending on the CMM model. It can be of two types, which differ in approaches to solving the assigned tasks.

In one model, test 22 involves the performance of a "thought experiment", the conditions of which, as well as the active substances, are indicated in the task. In the second type of CMM, the solution to this examination question is to perform laboratory work, which includes real scientific experience.

Approximate content

All the options for this challenge have a similar structure. The examinees are given information about the available elements and compounds, and are invited to obtain any other substance by carrying out reactions. Moreover, with a "thought experiment" it is required to imagine the course of work and fix it in the field for a detailed answer, and with a real laboratory work conduct the experiment and describe it.

For example, in accordance with the tasks, from the listed substances it is necessary to obtain certain types of specific chemical element(copper, magnesium, etc.) - hydroxide, hydroxyl or pure form. Also, the conditions can indicate in how many stages the reaction should take place.

Evaluation of results

At this stage, you can get the maximum possible number of points for the right decision... In the first model, it will be 5 points, in the second - 4.