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H2SO4(aq) 2H+(aq) + SO4 2- (aq) , the addition of which compound will cause a shift in equilibrium because of a common ion effect?

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THe addition of strong electrolyte such as MgSO4 compound will led the equilibrium to shift due to common ion effect. The addition of common ion decrease the solubility as the reaction shift to the left thus less product is formed.
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