Weak acids: formic acid, K_a = 1.77 times 10^-4, 200 M acetic acid, K_a = 1.75 t

Question

Weak acids: formic acid, K_a = 1.77 times 10^-4, 200 M acetic acid, K_a = 1.75 times 10^-5 5.500 M propionic acid, K_a = 1.34 times 10 5.300 M sodium bisulfate monohydrate, K_a = 1.20 times 10^-2, 3.00 M Conjugate bases: sodium sulfate decahydrate, Na_2SO_4 middot 10H_2O sodium propionate, CH_3CH_2COONa sodium formate, HCOONa. sodium acetate trihydrate, CH_3COONa middot 3H_2O 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 = 1.0? Based on this information, what volume of acid should the student measure to make the 0.100 M buffer solution?

Explanation / Answer

Here, Macid=0.100 M, Vacid= ?

Mbuffer=0.100 M, Vbuffer= 100 mL

Macid x Vacid = Mbuffer x Vbuffer

=> Vacid = Mbuffer x Vbuffer/ Macid = 0.100 M x 100 ml / 0.100 M = 100 mL

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