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NEET 2015
Exam
NEET
Year
2015
Subject
Chemistry
Chapter
Ionic Equilibrium

NEET 2015 · Chemistry · Ionic Equilibrium

What is the pH of the resulting solution when equal volumes of 0.1...

What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?

Options

  1. A12.65
  2. B2.0
  3. C7.0
  4. D1.04

Correct answer

A. 12.65

Step-by-step solution

N1V1−N2V2=N.V.<br/><br/>{N}_{1}{V}_{1} - {N}_{2}{V}_{2} = N . V .<br /><br />0.1 \times 1 - 0.01 \times 1 = N \times 2<br/><br/><br /><br />\left[O{H}^{-}\right]=Nnet== {N}_{net} =\dfrac{0 . 09}{2} =0.045N<br/><br/><br /><br />pOH = - \log \left(0.045\right) = 1.35<br/><br/><br /><br />∴ pH = 14 - pOH = 14 - 1.35 = 12.65
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