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If you have 140. mL of a 0.100 M MOPS buffer at pH 7.20 and you...

If you have 140. mL of a 0.100 M MOPS buffer at pH 7.20 and you add 2.00 mL of 1.00 M HCl, what will be the new pH? (The pKa of MOPS is 7.20.)

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