Question

Enter your answer in the provided box. How much HCl must be added to a liter of buffer that is 1.6 M in acetic acid and 0.70 M in sodium acetate to result in a buffer pH of 4.20?

Answer 1

hiven inital concentration of cuzcool=rom initial concentration of Nachloo = 0'rom plea value of all cool=4.76 about calculate .pn of beeffer solution ph= plea t log (salt 3.4.76 + log (0.70 To ph = 4.40 . To lower this ph to 4:20 ratio of . Should be . 4.20 = 4.76 + log (Cuzcoona Cine coon ) , ? y to em cro Ha 0,275 can won 0.275 since he is added Help, en los ratos Cuzcoon t han an ealizoont nach Heace modes of chCoona de creeases and Cuzcoon increases ... to min Since 1 Litre volume is mentioned is equal to mole (cm= n/) = m = nn) amount bed so; molarity

-molu of chlooha is consumed and simutaneously is converted to enwoh Therefore, o.p.x / 1.6 tra i 0.375 sy 0.30-2 : 0.275 t6ta H0.70-41 16x0.275 +0.375 · ~ 1.275 x 2 0.26 of x = 0.109 o log moles He is added to lower its ph from 4,40 to 4.20
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