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  4. If the pH of HCl solution is 2 then the molar concentration of this will be:

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Q. If the $pH$ of $ HCl $ solution is $2$ then the molar concentration of this will be:

Rajasthan PMTRajasthan PMT 1999

Solution:

$pH =-\log \left[ H ^{+}\right] $
$ 2 =-\log \left[ H ^{+}\right] $
$\left[ H ^{+}\right] =10^{-2} $
$=0.01\, M $