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[求助] 请教两道英文的化学题

如题,求助。
1、Explain why MF(Metal F) shows increased solubility in acidic solution. Use an equilibrium reaction and the words pH and solubility in your answer.

2、A solution contains 0.25MHA(Ka=1×10-6) and 0.45MNaA.What is the pH after 0.32mole of HCl is added to 1.00L of the solution.

请高手指点。
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