THE VOLUME OF THE BUFFER SOLUTION PREPARED BY ADDING 5 G SOLID NH4CL TO 650 ML OF 0.45 M AMMONIA BASE SOLUTION IS COMPLETED TO 1 L. Ka=1.76*10^(-5) FOR ACETIC ACID Kb=1.86*10^(-5) FOR AMMONIA. A ) Find the pH of this buffer solution ? b) When 6 millimoles of hcl is added to this buffer solution, find the pH of the solution? MN =14 g/mol MCL=35.5 g/mol urgent please