Which of the following is true: NiCO3 ⇌ Ni2+ +CO32- I. dissolving NiCO3 in a 0.001M HCl solution will increase its solubility II. Dissolving NiCO2 in a 0.001M Ni(NO3)2 solution will increase its solubility a. I only b. II only c. Both I and II

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