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Question: Answered & Verified by Expert
The hydrogen ion concentration of a solution is $3.98 \times 10^{-6}$ mole per liter. The $\mathrm{pH}$ value of this solution will be
ChemistryIonic EquilibriumMHT CETMHT CET 2012
Options:
  • A $6.0$
  • B $5.8$
  • C $5.4$
  • D $5.9$
Solution:
2348 Upvotes Verified Answer
The correct answer is: $5.4$
$\mathrm{pH}=-\log \left[\mathrm{H}^{+}\right]$
$=-\log \left(3.98 \times 10^{-6}\right)$
$=-\log 3.98-\log 10^{-6}$
$=-0.59+6=5.41$

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