Question:medium

What is the pH of a 0.01 M solution of HCl?

Show Hint

For strong acids, pH is calculated directly from the molar concentration using \( \text{pH} = -\log_{10} [\text{H}^+] \).
Updated On: Nov 26, 2025
  • 1
  • 2
  • 3
  • 4
Hide Solution

The Correct Option is B

Solution and Explanation


Step 1: HCl, being a strong acid, undergoes complete dissociation, resulting in \( [\text{H}^+] = 0.01 \, \text{M} \).
Step 2: The pH is computed using the equation: \[ \text{pH} = -\log_{10} [\text{H}^+] \] Given that \( [\text{H}^+] = 0.01 = 10^{-2} \), the calculation proceeds as: \[ \text{pH} = -\log_{10} (10^{-2}) = 2 \] Step 3: Verification confirms that for strong acids, pH is solely determined by concentration, aligning with option (2).
Was this answer helpful?
0