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a) How many mL of each of 0.10 M lactic acid solution and 0.10 M NaOH solution are needed to make 800 mL of a buffer of pH 3.50?

b) If 0.10 g of NaOH were added to the buffer in question 7, above, what would be the new pH?

c) If 0.15 g of HCl were added to the buffer in question 7, above, what would be the new pH?

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