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 calculation: \(\text{pH} = -\log[\text{H}^+]\). For 0.0001 M HCl, \([\text{H}^+] = 10^{-4} \, \text{M}\), then \(\text{pH} = -\log(10^{-4}) = 4\). The pH is 4.