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Using a 0.20 M phosphate buffer with a pH of 6.4, you add 0.72 mL of...

Using a 0.20 M phosphate buffer with a pH of 6.4, you add 0.72 mL of 0.51 M HCl to 45 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.)

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Answer #1

pka, of phosphoric acid = 7:21 moles of the buffer solution = mx V → 0120X0.045 20.009 mdes pH = pkatlog (salt) Let assume mo

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