Question:
Calculate pOH of 0.001M HCl solution.
Calculate pOH of 0.001M HCl solution.
Show Hint
HCl is a strong acid, so pH = 3 and pOH = 14 - 3.
Updated On: Oct 1, 2026
- \(11\)
- \(10\)
- \(12\)
- \(3\)
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Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
HCl is a strong acid and ionises completely, so \([\text{H}^+]\) equals the acid concentration. At 25 degrees C, \(\text{pH} + \text{pOH} = 14\).
Step 2: Detailed Explanation
\[ [\text{H}^+] = 10^{-3} \text{ M} \Rightarrow \text{pH} = 3 \]
\[ \text{pOH} = 14 - 3 = 11 \]
Option (D), 3, is the pH, not the pOH. Options (B) and (C) are not consistent with pH 3.
Final Answer:
The pOH is 11, option (A). \[ \boxed{11} \]
HCl is a strong acid and ionises completely, so \([\text{H}^+]\) equals the acid concentration. At 25 degrees C, \(\text{pH} + \text{pOH} = 14\).
Step 2: Detailed Explanation
\[ [\text{H}^+] = 10^{-3} \text{ M} \Rightarrow \text{pH} = 3 \]
\[ \text{pOH} = 14 - 3 = 11 \]
Option (D), 3, is the pH, not the pOH. Options (B) and (C) are not consistent with pH 3.
Final Answer:
The pOH is 11, option (A). \[ \boxed{11} \]
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