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what happen when you dip a magnesium ribbon in copper sulphate solution. write its chemical equation also

Posted by Harshit Arora 6 years, 7 months ago

CBSE > Class 08 > Science

1 answers

Sia ? 6 years, 7 months ago

Magnesium (Mg) is a more reactive metal than the copper (Cu) in the aqueous copper (II) sulfate. When you place a solid Mg ribbon into the blue CuSO4 solution, a metal displacement reaction occurs.
In this reaction, the Mg is oxidized, releasing 2 electrons: Mg-->Mg2+ + 2e-

In this reaction, the Cu2+ in the aqueous solution is reduced as it picks up the 2 electrons released by Mg:

Cu2+ + 2e- --> Cu (solid)

The overall reaction is: Mg(s) + CuSO4(aq) --> MgSO4(aq) + Cu(s); the magnesium, because it is more reactive than copper, displaces it. The blue solution will turn reddish black with the introduction of Mg. This new solution will eventually clear as the reddish copper settles out; MgSO4(aq) is colorless.

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