Write the balanced equations for the following reactions, and add the state symbols:
a) Magnesium carbonate reacts with hydrochloric acid to produce magnesium
chloride, carbon dioxide and water.
b) Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and
water.
Answers
(a) . Mgco3+Hcl--->Mgcl+Co2+H2o
(b) .Na(OH) 2+H2So4 --->Naso4+H2o
Answer:
1. MgCO₃ + 2HCl ---------> MgCl₂ + CO₂ + H₂O
2. 2NaOH + H₂SO₄ --------> Na₂SO₄ + 2H₂O
Step-by-step balancing:
1. Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide and water.
MgCO₃ + HCl ---------> MgCl₂ + CO₂ + H₂O
LHS RHS
Mg - 1 Mg - 1
C - 1 C - 1
O - 3 O - 3
H - 1 H - 2
Cl - 1 Cl - 2
On LHS, multiply HCl by 2.
MgCO₃ + 2HCl ---------> MgCl₂ + CO₂ + H₂O
LHS RHS
Mg - 1 Mg - 1
C - 1 C - 1
O - 3 O - 3
H - 2 H - 2
Cl - 2 Cl - 2
____________________________
2. Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.
NaOH + H₂SO₄ --------> Na₂SO₄ + H₂O
LHS RHS
Na - 1 Na - 2
S - 1 S - 1
O - 5 O - 5
H - 3 H - 2
On LHS, multiply NaOH by 2.
2NaOH + H₂SO₄ --------> Na₂SO₄ + H₂O
LHS RHS
Na - 2 Na - 2
S - 1 S - 1
O - 6 O - 5
H - 6 H - 2
On RHS, multiply water by 2.
2NaOH + H₂SO₄ --------> Na₂SO₄ + 2H₂O
LHS RHS
Na - 2 Na - 2
S - 1 S - 1
O - 6 O - 6
H - 4 H - 4