Why colourless concentrated sulphuric acid in a test tube changes to blue on adding a small piece of copper to it?
Answers
Answered by
1
Explanation:
H2SO4 + Cu --------> CuSO4 + H2
copper displaces hydrogen. Hence it is a displacement reaction.
Answered by
0
Answer: because of the reaction H2so4 + cu --> CuSO4 + h2
Explanation : as the colour of cuso4 is blue it changes
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