Correct Answer - Option 1 : 4.75
pH: The negative of the logarithm to base 10 of the concentration of hydrogen ions, measured in moles per liter.
- A measure of acidity or alkalinity of a substance, which takes numerical values from 0 (maximum acidity) through 7 (neutral) to 14 (maximum alkalinity).
Buffer: A solution containing appreciable amounts of a weak conjugate acid-base pair is called a buffer solution, or a buffer.
- Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added.
Buffer can be classified into two types;
Acidic Buffer: The buffer is formed from the solution of a weak acid and its salt of a strong base. acid. Acidic buffers generally have a pH of less than 7.
Example of an acidic buffer is CH3COOH and CH3COONa.
Basic Buffer: The buffer is formed from the solution of a weak base and its salt with a strong acid. basic buffers have a pH of more than 7.
Example of the basic buffer is NH4OH and NH4Cl.
- A mixture of Acetic acid and Sodium acetate acts as a buffer solution around pH 4.75.
- A mixture of NH4OH and NH4Cl act as buffer solution around pH 9.25.
Hence, we conclude that The value of pH for a buffer which is a mixture of Acetic acid and Sodium acetate is 4.75