Write the balanced chemical equations of the following word equations.

(a) Sodium hydroxide + sulphuric acid ⟶ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid ⟶ potassium sulphate + carbon dioxide + water

(c) Iron + sulphuric acid ⟶ ferrous sulphate + hydrogen

(d) Chlorine + sulphur dioxide + water ⟶ sulphuric acid + hydrogen chloride

(e) Silver nitrate ⟶ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid ⟶ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen ⟶ nitric oxide + water

(h) Barium chloride + sulphuric acid ⟶ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen ⟶ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water ⟶ aluminium hydroxide + methane

(k) Iron pyrites (FeS₂) + oxygen ⟶ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid ⟶ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide ⟶ sodium sulphate + sodium meta aluminate + water

(n) Aluminium + sodium hydroxide + water ⟶ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid ⟶ potassium sulphate + chromium sulphate + water + oxygen

(p) Potassium dichromate + hydrochloric acid ⟶ potassium chloride + chromium chloride + water + chlorine

(q) Sulphur + nitric acid ⟶ sulphuric acid + nitrogen dioxide + water

(r) Sodium chloride + manganese dioxide + sulphuric acid ⟶ sodium hydrogen sulphate + manganese sulphate + water + chlorine

Sodium chloride reacts with silver nitrate to produce silver chloride and sodium nitrate

(a) Write the equation.

(b) Check whether it is balanced, if not balance it.

(c) Find the weights of reactants and products.

(d) State the law that this equation satisfies.

(a) What are poly-atomic ions ? Give two examples.

(b) Name and state the fundamental law that every equation must fulfill.

Give the information conveyed by the chemical formula of a compound.