Explain what is the ph of a 3-nitrobenzoic acid

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Problem- What is the pH of a 3-Nitrobenzoic acid/3-Nitrobenzoate buffer which was prepared by combining 15.00 g of 3-Nitrobenzoic acid and 1.00 g of NaOH in 1 liter of solution? (Assume gamma = 1) b). What would be the effect on the pH in part a)if 1 mL of 0.1 M HCl were added to 100 mL of the buffer? (Assume gamma = 1)

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