1.

Calculate the amount of (NH4)2SO4 (in gram) which must be added to 1 L solution of 0.2 M NH4OH to yield a solution of pH=9.35 at 25oC.(Assume volume is not changing during the reaction)Kb for NH4OH is 1.8×10−5 Take log 1.8=0.25 and 100.1=1.25

Answer»

Calculate the amount of (NH4)2SO4 (in gram) which must be added to 1 L solution of 0.2 M NH4OH to yield a solution of pH=9.35 at 25oC.

(Assume volume is not changing during the reaction)

Kb for NH4OH is 1.8×10−5

Take log 1.8=0.25 and 100.1=1.25


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