One Liter of Water Is Mixed with Excess CaCO3(s),setting Up $\leftrightarrows$

question 7

Multiple Choice

One liter of water is mixed with excess CaCO3(s) ,setting up the following equilibrium.CaCO₃(s) $\leftrightarrows$ Ca²⁺(aq) + CO₃^2-(aq)
What is the effect on the solubility of CaCO₃(s) as HNO₃(aq) is added? (assume no change in volume)

• A) the solubility of CaCO₃ decreases because the acid increases the amount of CO₃^2-
• B) the solubility of CaCO₃ increases because the acid increases the amount of CO₃^2-
• C) the solubility of CaCO₃ decreases because the acid decreases the amount of CO₃^2-
• D) the solubility of CaCO₃ increases because the acid decreases the amount of CO₃^2-
• E) the solubility of CaCO₃ is unchanged

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