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Ionic Equilibrium — Chemistry STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12ChemistryIonic Equilibrium1 Mark
MCQ
The pH of $0.001 M$ HCI solution is ………
  • ✓
    $3$
  • B
    $2$
  • C
    $1$
  • D
    $11$
✓

Answer

Correct option: A.
$3$
$(a)\ 3$
${\left[ H _3 O ^{+}\right]=0.001 mol dm ^{-3}}$
$pH =-\log _{10}\left[ H _3 O ^{+}\right]=-\log _{10}[0.001]$
       $=-1 \log _{10}\left[10^{-3}\right]=3$
$pH =3$

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