(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$. When $HCl$ (a strong acid) is added,it

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The molar concentration of $CH_3COO^-$ decreases.

(A) Acetic acid $(CH_3COOH)$ is a weak acid that dissociates as: $CH_3COOH \rightleftharpoons CH_3COO^- + H^+$. When $HCl$ (a strong acid) is added,it provides a high concentration of $H^+$ ions. According to Le Chatelier's principle,the increase in the concentration of $H^+$ ions shifts the equilibrium to the left. This results in the formation of more $CH_3COOH$ and a decrease in the concentration of $CH_3COO^-$ ions due to the common ion effect.

Class 11 Chemistry 6-2.Equilibrium-II (Ionic Equilibrium)Common ion effect

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When $0.01 \ M \ HCl$ is added to an aqueous solution of acetic acid,then...

A
The molar concentration of $CH_3COO^-$ decreases.
B
The molar concentration of $CH_3COOH$ decreases.
C
The molar concentration of $CH_3COO^-$ increases.
D
None of these.

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6-2.Equilibrium-II (Ionic Equilibrium)

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Common ion effect

$A$ litre of solution is saturated with $AgCl$. To this solution if $1.0 \times 10^{-4} \ mol$ of solid $NaCl$ is added,what will be the $[Ag^{+}]$ compared to the original concentration,assuming no volume change?

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$A$ saturated solution of $BaSO_4$ at $25^\circ C$ is $4 \times 10^{-5} \ M$. The solubility of $BaSO_4$ in $0.1 \ M \ Na_2SO_4$ at this temperature will be:

MediumWBJEE 2021

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When $H_2S$ gas is passed through a solution containing $HCl$,it precipitates the cations of the second group of qualitative analysis but not those belonging to the fourth group. This is because:

MediumAIPMT 2005

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In the precipitation of the iron group in qualitative analysis,ammonium chloride is added before adding ammonium hydroxide to:

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Consider the following equilibrium: $AgCl_{(s)} + 2NH_{3(aq)} \rightleftharpoons [Ag(NH_3)_2]^+_{(aq)} + Cl^-_{(aq)}$. $A$ white precipitate of $AgCl$ appears on adding which of the following?

MediumJEE MAIN 2014

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$A$ litre of solution is saturated with $AgCl$. To this solution if $1.0 \times 10^{-4} \ mol$ of solid $NaCl$ is added,what will be the $[Ag^{+}]$ compared to the original concentration,assuming no volume change?

$A$ saturated solution of $BaSO_4$ at $25^\circ C$ is $4 \times 10^{-5} \ M$. The solubility of $BaSO_4$ in $0.1 \ M \ Na_2SO_4$ at this temperature will be:

When $H_2S$ gas is passed through a solution containing $HCl$,it precipitates the cations of the second group of qualitative analysis but not those belonging to the fourth group. This is because:

In the precipitation of the iron group in qualitative analysis,ammonium chloride is added before adding ammonium hydroxide to:

Consider the following equilibrium: $AgCl_{(s)} + 2NH_{3(aq)} \rightleftharpoons [Ag(NH_3)_2]^+_{(aq)} + Cl^-_{(aq)}$. $A$ white precipitate of $AgCl$ appears on adding which of the following?

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