Reactions of acids
Some metals will react with acids to neutralise them and give off hydrogen gas molecules.
The general word equation for the reaction is:
METAL +ACID → SALT + HYDROGEN
Zinc + Sulphuric acid → Zinc sulphate + Hydrogen
(Zn + H2SO4 → ZnSO4 + H2)
Remember that at Credit level you will be expected to balance formula equations.
Now try the typical Standard Grade question below.
Change the word equation below into a formula equation.
magnesium + hydrochloric acid → magnesium chloride + hydrogen
Remember the formula for a metal is just its symbol.
Mg + HCl → MgCl2 + H2
Try to balance the formula equation above.
Mg + 2HCl → MgCl2 + H2
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