Answer C5H5NHCl(1) < KI(2) < NaF(3) < NaOCl(4) Explanation Conjucate base of a w
ID: 700050 • Letter: A
Question
Answer
C5H5NHCl(1) < KI(2) < NaF(3) < NaOCl(4)
Explanation
Conjucate base of a weak acid is strong base and vice versa
Conjucate acid of a weak base is strong acid and vice versa
Ka and Kb values indicate acid and base strength respectively
F- and ClO- are conjucate bases of acids HF and HClO respectively.So, the solutions of NaF and NaClO will be basic. HClO is weak acid(Ka is 3.0 ×10^-8) than HF( Ka is 6.8 ×10^-4), So, 0.1M NaClO solution will be more basic than 0.1M HF solution
KI is salt made from strong acid HI and strong base NaOH , so 0.1M KI solution will be neutral
C5H5NH+ is conjucate acid of weak base C5H5N, So, 0.1M C5H5NHCl solution will be acidic
The increasing order of pH for the given 0.1M solutions is
C5H5NHCl(1) < KI(2) < NaF(3) < NaOCl(4)
Explanation / Answer
-Predicting the qualitative acid-base p of salts hypochlorous acid HCIO 3.0x 10 acid HF 6.8 x 10 the pH 0.1 M KF 0.1 M KI 18