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JIPMER2017ChemistryIonic Equilibrium

When 750 mL of 0.5 M HCl is mixed with 250 mL of 2 M NaOH solution, the value of pH will be

Options

  1. ApH =7
  2. BpH 7
  3. CpH 7
  4. DpH =0

Correct answer

B. pH 7

Step-by-step solution

aligned n_ HCl & =M_ HCl V_ HCl and n_ NaOH & =M_ NaOH V_ NaOH aligned where, n= number of moles aligned & M= molarity, V= volume & n_ HCl =0.5 750=375 milimoles. & n_ NaOH =2.0 250=500 milimoles. & n_ NaOH n_ HCl aligned The solution is basic and has pH 7 .

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