Reactions of metals with dilute acids
3 marks · EasyGive the general word equation for the reaction between a metal and a dilute acid.
Potassium cannot safely be reacted with dilute acids in the laboratory. Explain why.
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(a) Metal + acid → salt + hydrogen
(b) Potassium is too reactive and reacts explosively with dilute acids, which is dangerous. · must show Too reactive, Reaction is explosive or violent
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Marking points
B1 (a) · 1 mark · Correct word equation: metal + acid → salt + hydrogen.
B2 (b) · 1 mark · States potassium is very reactive/too reactive.
B3 (b) · 1 mark · States reaction is explosive/violent or dangerous.
Worked solution
(a) Metal + acid → salt + hydrogen
(b) Potassium is too reactive and reacts explosively with dilute acids. This makes it too dangerous to carry out the reaction safely.