I want to give some information abot the experiment. So I used $20$ml $0\mathrm{.}1$M concentration of CH$3$COOH and I found its ph values in part a $.$ I couldn't do the part c$.$ I wrote the equilibrium equation below. So can you please solve the part c and also can you please explain why this values give an estimate for the constant $??$ Thank you in advance. Also please try to solve yourself not make solve it to AI$.$ If you help me I will definitely give your credit!