calculate the ph of solution formed by mixing 0.2 M NH4Cl and 0.1 NH3 .(poh of ammonia solution is 4.75)

Asked by gayathrigayisv | 23rd Oct, 2020, 03:08: PM

Expert Answer:

It is pKb of  ammonia solution. pKb =4.75. It is a buffer solution.
p O H equals p K subscript b space plus space log fraction numerator left square bracket S a l t right square bracket over denominator left square bracket B a s e right square bracket end fraction
p O H equals 4.75 plus log fraction numerator 0.2 over denominator 0.1 end fraction
p O H equals 4.75 plus log 2
p O H equals 4.75 plus 0.30
space space space space space space space equals 5.05
p H equals 14 minus p O H
space space space space equals 14 minus 5.05
space space space space equals space 8.95

Answered by Ravi | 25th Oct, 2020, 05:37: PM

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