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A student must make a buffer solution with a pH of 3.0. Determine which of the acids and conjugate bases listed below are the best options to make a buffer at the specified pH. Weak acids: formic acid, K_a = 1.77 times 10^-4 acetic acid: K_a = 1.75 times 10^-5 phosphoric acid, K_a = 7.52 times 10^-3 propionic acid, K_a = 1.34 times 10^-5 Conjugate bases: sodium acetate trihydrate CH_3COONa middot 3H_2O sodium formate HCOONa sodium dihydrogen phosphate monohydrate NaH_2PO_4 middot H_2O sodium propionate CH_3CH_2COONa The final volume of buffer solution must be 100.00 mL and the final concentration of the weak acid must be 0.100 M. Based on this information, what mass of solid conjugate base should the student weigh out to make the buffer solution with a pH=3.0?
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Answer:-
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