Question

pH value of 0.0001 M HCl solution is

• A. 5
• B. 6
• C. 4
• D. 3

Hint:

pH is the negative logarithm of the concentration of hydrogen ions \([H^+]\).

Answer 1

The Correct Option is C

pH of a solution is calculated using: \[ \text{pH} = -\log[\text{H}^+] \] For 0.0001 M HCl, \([\text{H}^+] = 10^{-4} \, \text{M}\), so the pH is: \[ \text{pH} = -\log(10^{-4}) = 4 \] Thus, the correct answer is 4.