Question

8. Express the following statements as chemical equations and then balance the equations :-
(a) Sodium metal reacts with water to give sodium hydroxide and hydrogen.
(b) Aluminium metal replaces iron from ferric oxide giving aluminium oxide and iron.
(c) Hydrogen sulphide gas burns in air to form water and sulphur dioxide.
(d) Barium chloride reacts with zinc sulphate to produce zinc chloride and a precipitate a barium
sulphate.

Answer 1

$$\begin{gathered} 2Na+2H_{2}O\to 2NaOH+H_2 \\ 2Al+F{e}_2{O}_3\to A{l}_2{O}_3+2Fe \\ 2H_{2}S+3O_2\to 2H_{2}O+2S{O}_2 \\ BaC{l}_2+ZnS{O}_4\to BaS{O}_4+ZnC{l}_2 \end{gathered}$$