Which of the following acts as a buffer solut | vedclass

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

Question

(C) buffer solution is formed by a weak acid and its conjugate base or a weak base and its conjugate acid. In option $C$,we have $40 \, mL$ of $0.1 \,

Vedclass · Accepted Answer

$40 \, mL \, of \, 0.1 \, M \, NaCN + 20 \, mL \, of \, 0.1 \, M \, HCl$

Vedclass · Answer

(C) buffer solution is formed by a weak acid and its conjugate base or a weak base and its conjugate acid. In option $C$,we have $40 \, mL$ of $0.1 \, M \, NaCN$ $(4 \, mmol)$ and $20 \, mL$ of $0.1 \, M \, HCl$ $(2 \, mmol)$. The reaction is: $NaCN + HCl \rightarrow HCN + NaCl$. After the reaction,$2 \, mmol$ of $NaCN$ (weak base) remains and $2 \, mmol$ of $HCN$ (conjugate acid) is formed. Since we have a mixture of a weak acid $(HCN)$ and its salt with a strong base $(NaCN)$,it acts as an acidic buffer.

Which of the following acts as a buffer solution?

Similar Questions

The $pH$ of a buffer solution decreases by $0.02$ units when $0.12 \ g$ of acetic acid is added to $250 \ mL$ of a buffer solution of acetic acid and potassium acetate at $27^{\circ} C$. The buffer capacity of the solution is

Which of the following mixtures in water acts as a buffer?

Which statement is correct for a mixture of $1 \ M \ NaCl$ and $1 \ M \ HCl$?

What would be the $pH$ of a solution obtained by mixing $5 \ g$ of acetic acid and $7.5 \ g$ of sodium acetate and making the volume equal to $500 \ mL$? $(K_a = 1.75 \times 10^{-5}, pK_a = 4.76)$

$A$ buffer solution has equal volumes of $0.2 \ M \ NH_4OH$ and $0.02 \ M \ NH_4Cl$. The $pK_b$ of the base is $5$. The $pH$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module