0.050 m monoprotic weak acid solution has a pH of 2.40. Calculate the pKa of the acid
a) Use the formula pH = pKa + log([A-]/[HA]) and rearrange it to solve for pKa
b) Substitute the given pH value and concentration of the acid solution into the equation
c) Calculate the concentration of the acid and its conjugate base using the given information
d) Solve for pKa using the calculated concentrations and the given pH value