In the given question Ka values of five weak acids are given. Ka for HA = 10^-8, HB = 10^-6, HC = 2× — AITS & Test Series Chemistry Question

💡 Solution & Explanation

For NaA, 14 6 W h 8 a K 10 K 10 K 10       For NaB, 14 8 W h 6 a K 10 K 10 K 10       For NaC, 14 6 W h 8 a K 10 10 K K 2 2 10        For NaD, 14 4 W h 10 a K 10 K 10 K 10       For NaE, 14 7 W h 7 a K 10 K 10 K 10       Since, h K of NaD is the highest, therefore, NaD is most extensively hydrolysed. For NaB,   W a 1 pH pK pK logC 2    or   1 1 1 1 pH 14 6 log 20 1 19 2 10 2 2              or pH = 9.5 For isohydric solution, 1 2 a 1 a 2 K C K C  7 6 8 10