For any diprotic acid of the type H_2A,the re | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) For a diprotic acid $H_2A$,the ionization occurs in two steps:$1$. $H_2A(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + HA^-(aq)$ with constant $Ka

Vedclass · Accepted Answer

$Ka_2 < Ka_1$

Vedclass · Answer

(C) For a diprotic acid $H_2A$,the ionization occurs in two steps:$1$. $H_2A(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + HA^-(aq)$ with constant $Ka_1$.$2$. $HA^-(aq) + H_2O(l) \rightleftharpoons H_3O^+(aq) + A^{2-}(aq)$ with constant $Ka_2$.In the second step,the removal of a proton $(H^+)$ from a negatively charged species $(HA^-)$ is much more difficult due to electrostatic attraction between the positive proton and the negative ion. Therefore,$Ka_1$ is always greater than $Ka_2$ ($Ka_1 > Ka_2$ or $Ka_2 < Ka_1$).

For any diprotic acid of the type $H_2A$,the relationship between the first $(Ka_1)$ and second $(Ka_2)$ ionization constants is:

Similar Questions

The conjugate acid of $NH_2^-$ is

Which type of reaction occurs between $H_{2}SO_{4}$ and $HNO_{3}$ in nitration?

Identify the amphoteric species among the following:
$(I) \, H_2O$
$(II) \, NH_2^-$
$(III) \, H_2PO_4^-$
$(IV) \, HCO_3^-$

What is the conjugate base of $OH^{-}$?

For the reaction $NH_4^+ + S^{2-} \rightleftharpoons NH_3 + HS^-$,identify the nature of $NH_3$ and $HS^-$ in the context of the Brønsted-Lowry theory.

Vedclass Test Series

Exam Paper Generator

Online Exam Module