One litre of a buffer solution containing 0 01 M NH4Cl and 0 1 M NH4OH having pKb of 5 - Chemistry - Equilibrium

Question

One litre of a buffer solution containing 0 01 M NH4Cl and 0 1 M
NH4OH having pKb of 5 has pH of? Answer is 10

Geetha · Accepted Answer

According to Henderson's equationpOH = pKb + log [salt][base]    = 5 + log 0
010 1   = 5 + log 0
1    = 5 + log (1×10-1)    = 5 - log 10    =5 -1    =4pH + pOH = 14pH =14 -pOH      =14 -4     =10

One litre of a buffer solution containing 0.01 M NH4Cl and 0.1 M NH4OH having pKb of 5 has pH of? Answer is 10