Which of the following solutions will act as | vedclass

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

Question

(D) buffer solution is formed by a mixture of a weak acid and its conjugate base,or a weak base and its conjugate acid. In option $D$,we have $10 \ mL

Vedclass · Accepted Answer

$10 \ mL$ of $0.1 \ M$ $H_2S$ + $15 \ mL$ of $0.1 \ M$ $Na_2S$

Vedclass · Answer

(D) buffer solution is formed by a mixture of a weak acid and its conjugate base,or a weak base and its conjugate acid. In option $D$,we have $10 \ mL$ of $0.1 \ M$ $H_2S$ (weak acid) and $15 \ mL$ of $0.1 \ M$ $Na_2S$ (salt of weak acid and strong base). The reaction is: $H_2S + Na_2S \rightarrow 2NaHS$. Initial moles: $H_2S = 1 \ mmol$,$Na_2S = 1.5 \ mmol$. After reaction: $H_2S$ is consumed,$NaHS$ is formed $(1 \ mmol)$,and $Na_2S$ remains $(0.5 \ mmol)$. This results in a mixture of $NaHS$ (weak acid) and $Na_2S$ (conjugate base),which forms an acidic buffer system.

Which of the following solutions will act as a buffer solution?

Similar Questions

Calculate the $pH$ of a buffer solution containing $0.01 \ M$ salt and $0.004 \ M$ weak acid. $(pK_{a} = 4.762)$

When $NaOH$ is added to a $CH_3COOH$ solution,$60\%$ of the acid is neutralized. If the $pK_a$ is $4.7$,the $pH$ of the resulting solution is:

An example of a neutral buffer is:

$2 \ g$ acetic acid and $3 \ g$ sodium acetate are present in $100 \ mL$ aqueous solution. What will be the $pH$ of the solution if the ionisation constant of acetic acid is $1.8 \times 10^{-5}$?

$A$ buffer solution is formed by a weak acid and its salt with a strong base,or a weak base and its salt with a strong acid. In which of the following pairs is this characteristic found?

Vedclass Test Series

Exam Paper Generator

Online Exam Module