Calculate the pH of the following solutions:

a$)5\mathrm{.}2104$M HNO$3[3\mathrm{.}28]$

b$)2\mathrm{.}8104$M Ba$($OH$)2[10\mathrm{.}75]$

c$)0\mathrm{.}40$ M CH$3$COOH $[2\mathrm{.}57]$

d$)0\mathrm{.}20$ M CH$3$COONa $[9\mathrm{.}02]$