Adding more water to a saturated solution will allow more CaCO3 to dissolve due to the now unsaturated mixture.
Adding NaHSO4 adds an acid to CaCO3 and that reacts with CaCO3 and the solubility will be increased.
Can you explain why adding Na2CO3 will DECREASE the solubility CaCO3? Think common ion effect and La Chatelier's Principle.
Which of the following would you add to a mixture of CaCO3(s) and its saturated solution to increase the molar solubility of CaCO3: more water, Na2CO3, NaOH, NaHSO4? Explain.
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