$2.5\;mL\;of\;\frac{2}{5}\;M$ weak monoacidic base ${K_b} = 1 \times {10^{ - 12}}\;\;{\rm{at}}\;25^\circ C$ is titrated with $\frac{2}{{15}}\;M\;{\rm{HCl}}$ in water at $25^\circ C$ The concentration of ${{\rm{H}}^ + }$ at equivalence point is ${K_w} = 1 \times {10^{ - 14}}\;{\rm{at}}\;25^\circ C$

JEE CHEMISTRY MCQ: Equilibrium

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2.5\;mL\;of\;\frac{2}{5}\;M

weak monoacidic base

{K_b} = 1 \times {10^{ - 12}}\;\;\mathrm{at}\;25^\circ C

is titrated with

\frac{2}{{15}}\;M\;\mathrm{HCl}

in water at

25^\circ C

The concentration of

{\mathrm{H}^ + }

at equivalence point is

{K_w} = 1 \times {10^{ - 14}}\;\mathrm{at}\;25^\circ C

View answer and explanation

Correct option: D

2.7 \times {10^{ - 2}}\;M

Option D (

2.7 \times {10^{ - 2}}\;M

) is correct because it accurately calculates the hydrogen ion concentration at the equivalence point considering the hydrolysis of the resulting salt.

More Questions from Equilibrium

Practice All Chapter MCQs →

The indicator used in titrating oxalic acid with caustic soda solution is:

\mathrm{K}_1

and

\mathrm{K}_2

are equilibrium constant for reactions (i) and (ii)

\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})\quad\ldots

(i)

\mathrm{NO}(\mathrm{g}) \rightleftharpoons \frac{1}{2} \mathrm{~N}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g})\quad\ldots

(ii)

Then,

K{a_1},\,\,\,K{a_2}\,\,\,\mathrm{and}\,\,\,K{a_3}

are the respective ionisation constants for the following reactions

\begin{array}{l} {H_2}S\leftrightharpoons{H^ + } + H{S^ - }\\ H{S^ - }\leftrightharpoons{H^ + } + {S^{2 - }}\\ {H_2}S\leftrightharpoons2{H^ + } + {S^{2 - }} \end{array}

The correct relationship between

K{a_1},\,\,K{a_2}\,,K{a_3}

is The

\mathrm{pH}

0.1 \mathrm{~M}-\mathrm{N}_2 \mathrm{H}_4

solution is (For

\mathrm{N}_2 \mathrm{H}_4,

K_{{b}_1}=3.6 \times 10^{-6}, K_{{b}_2}=6.4 \times 10^{-12}, \log 2=0.3

\log 3=0.48

) Reaction

{\text{Ba}}{{\text{O}}_2}(s) \rightleftharpoons {\text{BaO}}(s) + {{\text{O}}_2}(g);\Delta H = - {\text{ve}}.

In equilibrium condition pressure of

\text{O}_2

depends on: A : At equilibrium concentration of the reactant and product does not change with time for a chemical reaction.
R: The rate of reaction is zero at equilibrium.