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Strong base is dissolved in 675 mL of 0.200 M weak acid (a=3.87105) to make a buffer with a pH of 4.04. Assume that the

Strong base is dissolved in 675 mL of 0.200 M weak acid (a=3.87105) to make a buffer with a pH of 4.04. Assume that the volume remains constant when the base is added. HA(aq)+OH(aq)H2O(l)+A(aq) Calculate the pa value of the acid, and determine the number of moles of acid initially present.

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