Assignment:
Q1. A weak acid has a pKa of 3.654. If the solution pH is 3.741, what percentage of the acid is undissociated?
Q2. A weak acid has a pKa of 5.857. Calculate the pH of a solution in which the ratio of the concentrations of acid anion to undissociated anion ([A-]/[HA]) equals 7.555.
Provide complete and step by step solution for the question and show calculations and use formulas.