Question

PH can be kept constant with the help of *

Supersaturated solution

Unsaturated solution

Buffer solution​

Answer 1

pH can be kept constant with the help of a buffer solution.

Explanation:

• A solution whose pH changes very slightly by adding a small amount of an acid or a base is called a buffer solution.
• It is an aqueous solution containing a mixture of a weak acid and its conjugate base or vice versa.
• As there is only a slight or no change in the pH of buffer solutions, they are used for keeping a constant pH value in various chemical applications.

Answer 2

PH can be kept constant with the help of Buffer solution​

Explanation:

• Supersaturated solution: A solution that contains more than the maximum quantity of solute that may be dissolved at a given temperature is called a supersaturated solution. The injection of a tiny crystal of solute, known as a seed crystal, can start the recrystallization of excess dissolved solute in a supersaturated solution.
• Unsaturated solution: An unsaturated solution is a chemical solution in which the solute concentration is less than the equilibrium solubility. Unsaturated Solutions can be found in the following examples: Salt or sugar that has dissolved below the saturation threshold in water. Mist or air. Coffee with ice.
• Buffer solution​: A buffer solution is an aqueous mixture of a weak acid and its conjugate base, or the other way around. When a modest amount of strong acid or base is introduced to it, the pH changes very little.