Question

1)why was a concentrated solution used if there was no reaction with the diliute solution
2)how do the reactions of zinc with oxygen, water and acid compare with those of iron with these substances?
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Answer 1

Answer:

sorry not on your level so don't know the answer

Answer 2

Answer 1 : Because the concentrated solution has more acidic particles as compared to dilute acid, so when there is no reaction with dilute acid then we use the concentrated acid.

Answer 2 : Zinc is in a different group to iron on the Periodic Table. This tells us that it does not react the same way as iron does with oxygen. Zinc oxide (ZnO) is not a porous oxide, but forms a dense protective layer that cannot be penetrated by oxygen or water.

Hope this will help you.

Plz mark my answer as brainliest.