Question

Расставить коэффициенты в уравнениях реакций и определить тип реакций. ВАРИАНТ 1: ВАРИАНТ 2: Al + S = Al2S3 KClO3= KCl + O2 HgO = Hg + O2 N2 + H2 = NH3 CuCl2 + Mg = Cu + MgCl2 Fe2O3 + AL = Fe + Al2O3 CH4 = C + H2 Ca(OH)2 + HNO3 = Ca(NO3)2 + H2O CO + O2 = CO2 PbO2 = PbO + O2 SiO2 + Mg = Si + MgO Fe + O2 = Fe3O4 Fe(OH)3 + HCl = FeCl3 + H2O WO3 + H2 = W + H2O

Answer 1

2Al + 3S -> Al2S3  соединение
2KClO3 -> 2KCl + 3O2   разложение
2HgO -> 2Hg + O2    разложение
N2 + 3H2 -> 2NH3    соединение
CuCl2 + Mg -> MgCl2 + Cu   замещение
Fe2O3 + 2Al -> Al2O3 + 2Fe   замещение
CH4 -> C + 2H2   разложение
Ca(OH)2 + 2HNO3 -> Ca(NO3)2 + 2H2O   обмен
2CO + O2 -> 2CO2    соединение
2PbO2 -> 2PbO + O2   разложение
SiO2 + 2Mg -> Si + 2MgO   замещение
3Fe + 2O2 -> Fe3O4   соединение
Fe(OH)3 + 3HCl -> FeCl3 + 3H2O   обмен
WO3 + 3H2 -> W + 3H2O  замещение

Answer 2

Variant 1:

1. Al + S = Al2S3 - This is a synthesis reaction, where two elements combine to form a compound. - The balanced equation is: 2Al + 3S = Al2S3 [[1]].

2. KClO3 = KCl + O2 - This is a decomposition reaction, where a compound breaks down into simpler substances. - The balanced equation is: 2KClO3 = 2KCl + 3O2 [[2]].

3. HgO = Hg + O2 - This is a decomposition reaction. - The balanced equation is: 2HgO = 2Hg + O2 [[3]].

4. N2 + H2 = NH3 - This is a synthesis reaction. - The balanced equation is: N2 + 3H2 = 2NH3 [[4]].

5. CuCl2 + Mg = Cu + MgCl2 - This is a single replacement reaction, where one element replaces another in a compound. - The balanced equation is: CuCl2 + Mg = Cu + MgCl2 [[5]].

Variant 2:

1. Fe2O3 + Al = Fe + Al2O3 - This is a single replacement reaction. - The balanced equation is: Fe2O3 + 2Al = 2Fe + Al2O3 [[6]].

2. CH4 = C + 2H2 - This is a decomposition reaction. - The balanced equation is: CH4 = C + 2H2 [[7]].

3. Ca(OH)2 + HNO3 = Ca(NO3)2 + H2O - This is a double replacement reaction, where the cations and anions of two compounds switch places. - The balanced equation is: Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O [[8]].

4. CO + O2 = CO2 - This is a synthesis reaction. - The balanced equation is: 2CO + O2 = 2CO2 [[9]].

5. PbO2 = PbO + O2 - This is a decomposition reaction. - The balanced equation is: 2PbO2 = 2PbO + O2 [[10]].

6. SiO2 + Mg = Si + MgO - This is a single replacement reaction. - The balanced equation is: SiO2 + 2Mg = 2MgO + Si [[11]].

7. Fe + O2 = Fe3O4 - This is a synthesis reaction. - The balanced equation is: 4Fe + 3O2 = 2Fe2O3 [[12]].

8. Fe(OH)3 + HCl = FeCl3 + H2O - This is a double replacement reaction. - The balanced equation is: Fe(OH)3 + 3HCl = FeCl3 + 3H2O [[13]].

9. WO3 + H2 = W + H2O - This is a single replacement reaction. - The balanced equation is: WO3 + 3H2 = W + 3H2O [[14]].

Please let me know if you have any further questions!