Question

What is the pH of a 0.001 M HCl solution?

• A. 3
• B. 1
• C. 2
• D. 4

Answer 1

The Correct Option is A

Step 1: Use pH formula for strong acids: \[ \text{pH} = -\log[H^+] \] Step 2: Given concentration of HCl = 0.001 M = 10^{-3} \[ \text{pH} = -\log(10^{-3}) = 3 \] \[ \boxed{\text{pH} = 3} \]