Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Explain why?

+1 vote
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asked Mar 8, 2017 in Chemistry by sforrest072 (157,439 points) 61 410 937

1 Answer

+2 votes
answered Mar 8, 2017 by vikash (21,277 points) 4 19 70
selected Mar 8, 2017 by sforrest072
 
Best answer

Zinc is above hydrogen whereas copper is below hydrogen in the activity series of metals. That is why zinc displaces hydrogen from dilute hydrochloric acid, while copper does not.
Zn + HCl → ZnCl2 + H2
Cu + HCl → No reaction

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