Question

Срочно!!! Домашняя контрольная работа: 1. Даны схемы реакций: запишите уравнения данных реакций, расставьте коэффициенты, укажите типы химических реакций: 1) H2O = H2 + O2 2) Mg + CuCI2 = Cu + MgCI2 3) CH4 = C + H2 4) Na + O2 = Na2O 5) соляная кислота + магний - ........ + ......; 6) алюминий + кислород - .......; 7) оксид ртути - ...... + ......; 8) оксид калия + вода - .......

Answer 1

1. Даны схемы реакций: запишите уравнения данных реакций, расставьте коэффициенты, укажите типы химических реакций:
1) 2H2O = 2H2 + O2 (разложение)
2) Mg + CuCI2 = Cu + MgCI2 (замещение)
3) CH4 = C + 2H2 (разложение)
4) 4Na + O2 = 2Na2O (соединение)
5) соляная кислота + магний - ........ + ......;
2HCl + Mg = MgCl2 + H2
6) алюминий + кислород - .......;
4Al + 3O2 = 2Al2O3
7) оксид ртути - ...... + ......;
2HgO = 2Hg + O2
8) оксид калия + вода - .......
K2O + H2O = 2KOH

Answer 2

Reactions and Equations

1) The reaction is: H2O = H2 + O2. - This is a decomposition reaction, where water (H2O) breaks down into hydrogen gas (H2) and oxygen gas (O2).

2) The reaction is: Mg + CuCl2 = Cu + MgCl2. - This is a single replacement reaction, where magnesium (Mg) replaces copper (Cu) in copper chloride (CuCl2), resulting in the formation of copper (Cu) and magnesium chloride (MgCl2).

3) The reaction is: CH4 = C + 2H2. - This is a decomposition reaction, where methane (CH4) breaks down into carbon (C) and hydrogen gas (H2).

4) The reaction is: 2Na + O2 = Na2O. - This is a synthesis reaction, where sodium (Na) reacts with oxygen gas (O2) to form sodium oxide (Na2O).

5) The reaction is: HCl + Mg = MgCl2 + H2. - This is a double replacement reaction, where hydrochloric acid (HCl) reacts with magnesium (Mg) to form magnesium chloride (MgCl2) and hydrogen gas (H2).

6) The reaction is: 4Al + 3O2 = 2Al2O3. - This is a synthesis reaction, where aluminum (Al) reacts with oxygen gas (O2) to form aluminum oxide (Al2O3).

7) The reaction is: HgO = Hg + O2. - This is a decomposition reaction, where mercury(II) oxide (HgO) breaks down into mercury (Hg) and oxygen gas (O2).

8) The reaction is: K2O + H2O = 2KOH. - This is a synthesis reaction, where potassium oxide (K2O) reacts with water (H2O) to form potassium hydroxide (KOH).

Please note that the coefficients in the equations may vary depending on the specific conditions of the reaction.