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Standard VII

Chemistry

Balanced Chemical Equation

Write the bal...

Question

Write the balanced chemical equations for the following reactions.

(a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water

(b) Zinc + Silver nitrate → Zinc nitrate + Silver

(c) Aluminium + Copper chloride → Aluminium chloride + Copper

(d) Barium chloride + Potassium sulphate → Barium sulphate +

Potassium chloride

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Solution

(a)

(b)

(c)

(d)

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Q. Write a balanced chemical equation with the help of chemical symbols and formulas for the following reactions:

(i) Zinc + Silver nitrate

⟶

Zinc nitrate + Silver

(ii) Copper oxide + Hydrogen

⟶

Copper + Water

(iii) Barium chloride + Aluminium sulphate

⟶

Barium sulphate + Aluminium chloride

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ( $F e S_{2}$ ) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

Q. Given below are word equations. Convert them into chemical equations using symbols and valencies. Balance the equations. Use appropriate signs for gases and precipitates in the reaction.
i) Zinc Sulphide

+

Oxygen gas

\to

Zinc oxide solid

+

Sulphur dioxide gas
ii) Silver nitrate solution

+

Sodium chloride solution

\to

Silver chloride precipitate

+

Sodium nitrate solution
iii) Sulphur solid

+

Concentrated nitric acid

\to

Sulphuric acid

+

Nitrogen dioxide gas

+

Water
iv) Barium chloride Solution

+

Potassium sulphate Solution

\to

Barium sulphate Precipitate

+

Potassium chloride solution
v) Silver nitrate on heating

\to

silver metal

+

nitrogen dioxide gas

+

Oxygen gas.
vi) Aluminium hydroxide

+

Nitric acid

\to

Aluminium nitrate

+

Water.

Q. Write balanced chemical equations for each of the following reactions
1. Carbon dioxide Marble dissolves in hydrochloric acid to give calcium chloride water and carbon dioxide
2. Silver nitrate reacts with copper to produce copper nitrate and silver metal
3. Carbon dioxide gas is passed over lime water to form a precipitate of calcium carbonate
4. Aluminium Sulphate acts with Sodium Hydroxide to form precipitate of aluminium hydroxide and the solution of sodium sulphate
5. Barium Chloride solution reacts with sulphuric acid to form precipitate of Barium sulphate and solution of hydrochloric acid.

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