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JIPMER 2005
Exam
JIPMER
Year
2005
Subject
Chemistry
Chapter
Ionic Equilibrium

JIPMER 2005 · Chemistry · Ionic Equilibrium

NaOH(a q), HCl(a q), and NaCl(a q) concentration of each is 10^ -3...

NaOH(aq),HCl(aq),\mathrm{NaOH}(a q), \mathrm{HCl}(a q), and NaCl(aq)\mathrm{NaCl}(a q) concentration of each is 10−3M10^{-3} \mathrm{M}. Their pH will be respectively

Options

  1. A10,6,210,6,2
  2. B11,3,711,3,7
  3. C10,3,710,3,7
  4. D10,4,710,4,7

Correct answer

B. 11,3,711,3,7

Step-by-step solution

Given OH−\mathrm{OH}^{-}ion conc. is 10−3M10^{-3} \mathrm{M} we know [H+][OH−]=10−14\left[\mathrm{H}^{+}\right]\left[\mathrm{OH}^{-}\right]=10^{-14}  or [H+]=10−1410−3 or [H+]=10−11∵pH=−log⁡[H+]=−log⁡[10−11]\begin{array}{cc}\text{ or } & {\left[\mathrm{H}^{+}\right]=\frac{10^{-14}}{10^{-3}}} \\ \text{ or } & {\left[\mathrm{H}^{+}\right]=10^{-11}} \\ \because & \mathrm{pH}=-\log \left[\mathrm{H}^{+}\right]=-\log \left[10^{-11}\right]\end{array} Similarly pH of HCl is 3 and pH of NaCl is 7.
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