10
Write balanced equations for the reactions of the following :
(a) Iron with steam
(b) Calcium with water
(a) Iron with steam
(b) Calcium with water
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(a) $\ce{3Fe(s) + 4H2O(g) -> Fe3O4(s) + 4H2(g)}$ (1 Mark)
(b) $\ce{Ca(s) + 2H2O(l) -> Ca(OH)2(aq) + H2(g)}$ (1 Mark) (Deduct ½ mark for no/incorrect balancing in each case)
(b) $\ce{Ca(s) + 2H2O(l) -> Ca(OH)2(aq) + H2(g)}$ (1 Mark) (Deduct ½ mark for no/incorrect balancing in each case)