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Consider the insoluble compound zinc sulfide ZnS. The zinc ion also forms a complex with hydroxide ions. What is the balanced net ionic equation to show why the solubility of ZnS (s) increases in the presence of hydroxide ions and calculate the equilibrium constant for this reaction.

For Zn(OH)42- , Kf = 2.9×1015 . Use the pull-down boxes to specify states such as (aq) or (s). 

______ ( ) + _______ ( ) <---> ______ ( ) + _______ ( )

K=______

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