Question

Даны вещества: оксид магния, хлорид калия, железо, нитрат свинца(2), сульфат меди(2), серная кислота, гидроксид железа(3), оксид углерода(4). С какими из них реагирует соляная кислота. напишите уравнения реакций

Answer 1

MgO + 2HCl = MgCl2 + H2O
Fe + 2HCl = FeCl2 + H2(газ)
Pb(NO3)2 + 2HCl = PbCl2(осадок) + 2HNO3
Fe(OH)3 + 3HCl = FeCl3 + 3H2O 

Answer 2

Reactivity of Hydrochloric Acid with Given Substances

Hydrochloric acid (HCl) can react with various substances. Let's explore the reactions with the given substances:

1. Magnesium Oxide (MgO): Hydrochloric acid reacts with magnesium oxide to form magnesium chloride and water. The balanced chemical equation for the reaction is: ``` MgO + 2HCl -> MgCl2 + H2O ```

2. Potassium Chloride (KCl): Hydrochloric acid does not react with potassium chloride.

3. Iron (Fe): Hydrochloric acid reacts with iron to form iron(II) chloride and hydrogen gas. The balanced chemical equation for the reaction is: ``` Fe + 2HCl -> FeCl2 + H2 ```

4. Lead(II) Nitrate (Pb(NO3)2): Hydrochloric acid reacts with lead(II) nitrate to form lead(II) chloride, nitric acid, and nitrogen dioxide. The balanced chemical equation for the reaction is: ``` Pb(NO3)2 + 2HCl -> PbCl2 + 2HNO3 + NO2 ```

5. Copper(II) Sulfate (CuSO4): Hydrochloric acid reacts with copper(II) sulfate to form copper(II) chloride, sulfuric acid, and water. The balanced chemical equation for the reaction is: ``` CuSO4 + 2HCl -> CuCl2 + H2SO4 + H2O ```

6. Sulfuric Acid (H2SO4): Hydrochloric acid does not react with sulfuric acid.

7. Iron(III) Hydroxide (Fe(OH)3): Hydrochloric acid reacts with iron(III) hydroxide to form iron(III) chloride and water. The balanced chemical equation for the reaction is: ``` Fe(OH)3 + 3HCl -> FeCl3 + 3H2O ```

8. Carbon Dioxide (CO2): Hydrochloric acid does not react with carbon dioxide.

Conclusion

Hydrochloric acid can react with magnesium oxide, iron, lead(II) nitrate, copper(II) sulfate, and iron(III) hydroxide to form various products as described above.