For the reaction

CHEMISTRY · Subjective · A Level · Chemistry · Chemical equilibria (Le Chatelier’s principle and Kc) · Chemical equilibria (Le Chatelier’s principle and Kc)

Problem

For the reaction Ag(CN)2−⇌Ag++2CN−Ag(CN)_2^- \rightleftharpoons Ag^+ + 2CN^-, the KCK_C at 25°C is 4×10−194 \times 10^{-19}. Calculate [Ag+][Ag^+] in solution which was originally 0.1 M in KCN and 0.03 M in AgNO3AgNO_3.

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