Calculate the mass of solid ammonium chloride required to mix with 100 ml of 1.0m ammonia to prepare a 9.25 ph buffer

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14-03-2017
Chemistry

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Calculate the mass of solid ammonium chloride required to mix with 100 ml of 1.0m ammonia to prepare a 9.25 ph buffer

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Hagrid Hagrid · Answer 1 · 2017-03-26T11:07:42+02:00

Hagrid Hagrid

26-03-2017

Given:

Volume of base = 100 mL
Concentration of base = 1.0 m
pkb of ammonia = 4.75
ph of buffer = 9.25

pOH = pkb + log [salt]/[base]
= 4.75 + log[salt]/[1.0m]
calculate for the pOH.

pH = 14 - pOH

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