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How much 10.0 M HNO 3 must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium

How much 10.0 M HNO ₃must be added to 1.00 L of a buffer that is 0.0100 M acetic acid and 0.100 M sodium acetate to reduce the pH to 5.15? (pK _a of acetic acid = 4.75)

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