When a copper wire is left in silver nitrate solution

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When a copper wire was left in silver nitrate solution for sometime it was observed that the solution turns green.i) explain the observation.ii) write the balanced chemical equation to represent the change taking place.

(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answered by admin @


SOLUTION:

i).Copper is more reactive than silver. Hence when copper wire is dipped in silver nitrate solution it displaces silver from Silver Nitrate (AgNO3 ) solution forming copper nitrate which is bluish green in colour.


ii).Cu(s) + 2AgNO3(aq) -----> Cu(NO3)2 (aq)+ 2Ag(s)

This is a displacement reaction. A shining  grey white deposit of silver is formed on the copper strip and the solution becomes bluish green due to the formation of copper nitrate.

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