Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumBuffer solutionMedium2 minPYQ_2017

ChemistryMediumstatement

Addition of sodium hydroxide solution to a weak acid (HA) results in a buffer of pH 6. If ionization constant of HA is $10^{- 5}$ , the ratio of salt to acid concentration in the buffer solution will be:

Options:

Answer:

Solution:

$p H = {p k}_{a} + l o g [\frac{S a l t}{A c i d}]$ ( $∵ [Salt]=[Anion]$ )

$\Rightarrow 6 = 5 + \log \frac{S a l t}{A c i d}$

$\Rightarrow 1 = \log \frac{S a l t}{A c i d}$

$\Rightarrow l o g 10 = \log \frac{S a l t}{A c i d}$

$\frac{S a l t}{a c i d} = \frac{10}{1}$

Stream:JEESubject:ChemistryTopic:Ionic EquilibriumSubtopic:Buffer solution

⏱ 2mℹ️ Source: PYQ_2017

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