of NH (, ) is mixed with of HCl. The pH of the resulting solution is about (use )

Answer and explanation

Correct answer: D. 5.28

  1. Step 1: Calculate the moles of reactants: and . The reaction reaches complete stoichiometric neutralization to form .
  2. Step 2: Determine the salt concentration in the total volume : . Ammonium chloride is the salt of a weak base and strong acid, which hydrolyzes to give an acidic solution.
  3. Step 3: Use the cationic hydrolysis pH formula: . With , , and , evaluate: .
Answer
5.28.

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