Question

What is the pH of a weak base?

Answer 1

Part 1: pH

• The pH of any solution is defined as the negative log of Hydrogen ion concentration.
• Mathematically, $\mathrm{pH}=-{\log }_{10}\left[{\mathrm{H}}^{+}\right]$
• pH is used to determine the nature of the solution whether it is acidic, basic, or neutral.

Solution	pH range
Acidic	1 - 6.9
Neutral	7
Basic	7.1 - 14

Part 2: Identifying the pH of the weak base

• Based on the pH values, acidic and basic solutions can be further sub-divided into strong and weak acid and base.
• Thus, the pH value range of a weak base is 7.1 to 10 whereas a strong base is 10.1 to 14.