Question

Balance the following equations :
(a) Caco, (s) + HCl (aq) + CaCl, (aq) + H2O (1) + CO, (g)
(b) Zn (s) + HCl (aq) → ZnCl2 (aq) + H2(g)
(c) MnO2(s) + HCl (aq) → MnCl2(aq) + H2O (1) + C1, (g)
(d) Na C03 (s) + H2SO4 (aq) → Na2SO4 (aq) + H2O (1) + CO2(g)
(e) MgzN, (s) + H2O (1) ► Mg(OH), (s) + NH, (g)
(f) NH, (g) + O2(g) + N2 (8) + H2O (1)
(g) MgCl, (aq) + Na2CO, (aq) → MgCO, (s) + NaCl (aq)​

Answer 1

Answer:

Explanation:

1   Balance the equation = CaCO3 + HCl → CaCl2 + H2O + CO. Calcium carbonate is not very soluble in water. This is an acid-base reaction (neutralization): CaCO3 is a base, HCl is an acid.

2  Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)  ...  balanced molecular equation

Zn(s) + 2H+(aq) + 2Cl-(aq) ==> Zn2+(aq) + 2Cl-(aq) + H2(g)  ...  balanced ionic equation

Zn(s) + 2H+(aq) ==> Zn2+(aq) + H2(g)  ...  BALANCED NET IONIC EQUATION

3) MnO2 + HCl → MnCl2 + H2O + Cl2

The balanced chemical equation is

MnO2 + 4 HCl → MnCl2 + 2H2O + Cl 2

By means of a stoichiometry, 1 mol of manganese dioxide reacts with 4 mol of HCl (hydrochloric acid) to form 1 mol manganese chloride 1 mol of chloride & 2 mol of water.

(2) C2H4 + O2→ CO2 + H2O

The balanced equation is

C2H4 +3O2 → 2CO2 + 2H2O

Via stiochiometery, 1 mol of ethene reacts with 3 mol oxygen to produce to 2 mol of carbon dioxide and 2 mol of water

Answer 2

63637372727277277282