Question

Calculate the pH of a weak acid solution

Close Problem Tutored Practice Problem 16.4.3 STORE Calculate the pH of a weak acid solution ([HAlo > 100. Ka). Calculate the pH of a 0.595 M aqueous solution of acetic acid (CH3COOH, K, -1.8*10) and the equilibrium concentrations of the weak acid and its conjugate base pH CHCOOH = CHC00 lm Check Submnt Awe Show Approach

Answer 1

At equilbrium both the acetate and H+ conc would be same. First we have determine the degree of dissociation then the conc. will be evaluated

Date : TCH₃COOH C CH₃ Coo- + Ht 0 0 C-CX c-ca CL equ. CL Ко - С ХСе E (1-2) чhop d d Chomihafor 5 ) J 2 ka - Nć J 8x10-5 N 0:59.6 H X= 5.4 x 10-4 concentration of HT = C2 = 0.595x5.4 x 10 9.1 y = - Log [HT] = 349 CM₂ CooHoo - 3.213 x 10-4 . [CH₃COOH Jeg = 0.595-(3.213 X 109). (c-ca ) 0.59467 req