Question

Write balanced molecular equations for the following reactions in aqueous solution:

a) calcium + water à calcium hydroxide + hydrogen

b) barium chloride + sodium barium à sulfate sulfate + sodium chloride

 

Answer 1

part (a)

$Ca_{(s)}+2H_2O_{(l)}\to Ca(OH)_{2 (aq)} +H_{2(g)}$

part (b)

$BaCl_{2(aq)}+Na_2SO_{4(aq)}\to BaSO_{4(s)}+2NaCl_{aq}$