3 Tutor System
Starting just at 265/hour

# Translate the following statements into chemical equations and then balance them. (a) Hydrogen gas combines with nitrogen to form ammonia. (b) Hydrogen sulphide gas burns in air to give water and sulpur dioxide. (c) Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate. (d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

$$(a) H_{2} + N_{2} \rightarrow NH_{3}$$
Here on reactants side Hydrogen and Nitrogen both elements has 2 atoms and on products side Hydrogen and Nitrogen have 3 atoms each.
Equation is not balanced.
Balanced equation:
$$3H_{2} + 3N_{2} \rightarrow 2NH_{3}$$
Similarly,

$$(b) 2H_{2}S + 3O_{2} \rightarrow 2H_{2}O + 2SO_{2}$$

$$(c) 3BaCl_{2} + Al_{2}(SO_{4})_{3}$$

$$\downarrow$$

$$2AlCl_{3} + 3BaSO_{4}$$

$$(d) 2K + 2H_{2}O \rightarrow 2KOH + H_{2}$$