Exercise 2.5 Question 5 | Find Concentration of H⁺ Using pH Formula | 9th Class Math AJK Board 2025

Welcome to Solve it With Shoaib!
In this video, we solve Exercise 2.5 Question 5 from 9th Class Mathematics (AJK Board New Syllabus 2025, Chapter 2: Logarithms).

In this question, we are given the pH value of a solution, and we are required to find the concentration of hydrogen ions [H⁺] using the pH formula with the help of logarithms.

📘 Formula Used:
pH = −log₁₀[H⁺]

We will:

Rewrite the pH formula correctly

Convert the logarithmic form into exponential form

Find the value of [H⁺] step by step

Use logarithmic concepts clearly and simply


This question is very important for board exams and helps students understand the practical use of logarithms in science-related problems.

🎯 This lecture is specially prepared for AJK Board students of all districts and tehsils, including:
Mirpur, Bhimber, Kotli, Muzaffarabad, Bagh, Poonch, Neelum, Haveli, Sudhnoti, and Hattian Bala.

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