MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryIonic equilibriumPrevious Year Questions
The pKb of dimethylamine and pKa of acetic acid are 3.27 and 4.77 respectively at T(K). The correct option for the pH of dimethyl ammonium acetate solution is: (NEET 2021)
A.7.75✓ Correct
B.6.25
C.8.50
D.5.50
Explanation
The given salt is a salt of weak acid+ weak base. pH = 0.5 [pKw + pKa – pKb] pH = 0.5 [14+ 4.77 – 3.27] pH = 0.5 [15.5] pH = 7.75