An acidic buffer solution can be prepared by mixing a solution of:

What will be the change in $pH$ by adding $0.1 \ M$ $CH_3COONa$ to $0.1 \ M$ $CH_3COOH$ at $298 \ K$ temperature? (Given: $pK_a$ of $CH_3COOH = 4.74$)

The $pH$ of an acidic buffer mixture is

Calculate the $pH$ of a buffer solution prepared by mixing $30 \ mL$ of $0.1 \ M$ $NaOH$ and $100 \ mL$ of $0.1 \ M$ $CH_3COOH$. (Given: $pK_a$ of $CH_3COOH = 4.76$)

Given below are two statements:
Statement $I$: $A$ buffer solution is the mixture of a salt and an acid or a base mixed in any particular quantities.
Statement $II$: Blood is a naturally occurring buffer solution whose $pH$ is maintained by $H_2CO_3 / HCO_3^{-}$ concentrations.
In the light of the above statements,choose the correct answer from the options given below.

The Henderson-Hasselbalch equation for an acidic buffer is given by $pH - pK_a = 5$. This condition holds true when: