What is the pH of a solution of the strong base NaOH?

Answer and explanation

Correct answer: C. 11

  1. Step 1: Sodium hydroxide () is a strong base that ionizes fully in water, yielding .
  2. Step 2: Calculate the pOH: .
  3. Step 3: Use the equilibrium relation at : .
Answer
11.
Why not the others: 3 is the pOH () rather than pH (); 17 adds 14 and pOH instead of subtracting (); 10 is an acidic pH incompatible with a strong base.

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