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# Enter your answer in the provided box. A buffer that contains 0.388 M base, B, and 0.283 M of its conjugate acid, BH+,...

A buffer that contains 0.388 M base, B, and 0.283 M of its conjugate acid, BH+, has a pH of 8.99. What is the pH after 0.0020 mol of HCl is added to 0.250 L of this solution?

pH =

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