Calculate the pH with the correct significant figures of:
a. A solution prepared by dissolving 2.55g (NH4)2SO4 (FW=132.141;Ka of NH4 = 5.7x10^-10)in 100.0 ml of water, adding 100 ml of 0.201 M NaOH, and diluting to 500.0 ml with water.
b. H2C, is a weak diprotic acid with a Ka1=1.2X10^-3 and Ka2 = 8.9x10^-9. A 30.00 ml sample of .1055 M solution of this acid titrated with standard .1575 M NaOH. What is the pH after adding 33.25 ml of titrant to the acid solution.
The solution explains, with step-by-step calculation, how to find the pH from titrations.