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Chemistry Question on coordination compounds

In the change [Cu(H2O)6]2+−>[HCl][CuC(H2O)5]+ {[Cu(H2O)6]^2+ ->[HCl] }[CuC(H_2O)_5]^+, the colour changes from

A

blue to green

B

blue to pink

C

pink to green

D

pink to blue

Answer

blue to pink

Explanation

Solution

In the change [Cu(H2O)6]2++−>[HCl][CuCl(H2O)5]+\left[ Cu \left( H _{2} O \right)_{6}\right]^{2+}+ {->[{HCl}]} \left[ CuCl \left( H _{2} O \right)_{5}\right]^{+}, the colour changes from blue to pink.