Examples of pH Calculation
Example 1: A Solution is 0.055 M HBr. What is the pH of this solution?
Solution: Use the pH equation which is
pH = -log [H3O+]
0.055 M HBr, HBr is a strong acid.
[H3O+] = 5.5 × 10-2 M
pH = -log (5.5 × 10-2) = 1.26
Example 2: Determine the pH of a 0.010 M HNO3 Solution.
Solution:
Use the pH equation which is
pH = – log [ H+ ]
pH = – log [ 1.0 × 10-2 ]
pH = -(-2.0) = 2.0
Example 3: Calculate the pH of a solution of 0.0025 M H2SO4.
Solution:
pH = -log [2(2.5 × 10-3)
pH = -(-2.3) = 2.3
Example 4: What is the hydrogen ion concentration of an aqueous HCl solution that has a pH of 3.0?
Solution:
Use the pH equation which is pH = -log [ H+]
3.0 = – log [ H+]
[H+] = 1.0 × 10-3M
Example 5: What is the pH of a 2.5 × 10-6 M solution of HCl ?
Solution:
We can write equation for of a 2.5 × 10-6 M solution of HCl as
pH = -log [2.5 × 10-6]
pH = – (-5.6) = 5.6
Also, Check
How to Calculate pH of a Solution?
pH of a solution is a measure of how acidic or basic it is. It is measured in a scale of 0 to 14. pH or Potential of Hydrogen is a crucial measure in chemistry used to indicate the acidity or alkalinity of a solution. It measures the concentration of hydrogen ions (H+) in a solution. Understanding pH is essential in various fields, from chemistry and biology to environmental science and healthcare.
In this article, we are going to study about pH and cover various methods to calculate the pH of different solutions.
Table of Content
- What is PH
- How to calculate pH of solution?
- Using a pH Meter
- Using pH Indicators
- Calculation of pH from Concentration