Question

Copper turnings are added to a colourless salt solution. After 10 mins it was observed that the colourless solution turns blue and a shiney metal was deposited on copper turnings identify the colourless salt solution. Write the equation for the reaction

Answer 1

The salt solution is HgSO4

Equation -
HgSO4(aq) + Cu(s) --- CuSO4(aq) + Hg(s)

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Answer 2

the colourless solution is AgNO3

Cu+2AgNO3-------->Cu(NO3)2+2Ag

Explanation:

Copper is a reactive metal than silver so a displacement reaction happens and the AgNO3 turns blue(colour of cuno3)2) and the a silver coating is formed in copper.