pH of mixture containing two moles of NH4OH and half mole of H2SO4 is pKb of  NH4OH = 4.8

The mixture acts like a basic buffer;NH4OH is a monoacidic base;Number of gram equivalents = 2 x 1 = 2H2SO4 is a dibasic acid;Number of gram equivalents = 0.5 x 2 = 1SA 1. g. eq. +  WB1. g. eq.2 g. eq.1 g.eq.excess   →  Salt1 g. eq.+H2OpOH=pkb+logVsNsVbNb pOH=4.8+log11 pOH=4.8 ; pH=14-4.8=9.2 ;