Reactions of metals with water
2 marks · NormalState the general word equations for:
the reaction of a metal with cold water,
the reaction of a metal with steam.
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(a) metal + cold water → metal hydroxide + hydrogen
(b) metal + steam → metal oxide + hydrogen
Common mistakes: mixing up oxide and hydroxide in products
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Marking points
A1 (a) · 1 mark · Correct general word equation for reaction with cold water.
A2 (b) · 1 mark · Correct general word equation for reaction with steam.
Worked solution
a) The general word equation for a metal reacting with cold water is:
metal + cold water → metal hydroxide + hydrogen
b) The general word equation for a metal reacting with steam is:
metal + steam → metal oxide + hydrogen