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\\(Ni^{2+}(aq) +6NH_{3}(aq)<---->Ni(NH_{3})_{6}^{2+}(aq)\\) Green Colorless Viol

ID: 822434 • Letter: #

Question

(Ni^{2+}(aq) +6NH_{3}(aq)<---->Ni(NH_{3})_{6}^{2+}(aq))   

Green Colorless Violet

By adding NH3to the solution, the solution turned violet which shows there was a shift to the right because the reactant concentration of NH3increased. Drops of concentrated HCl were added to the solution and transitioned to a light green this indicates a shift towards the reactants because ?

Can someone explain why adding concentrated HCl would cause the solution to turn green (indicating a shift to the left/reactants) ?

Explanation / Answer

HCl is a acid and NH3 is a base so on addition of HCl to the solution it will react NH3

HCl + NH3 = NH4+ + Cl-

because of this acid-base reaction concentration of NH3 will decreases thus reaction shifts towards right and solution turn green.

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