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Salt of Strong Acid and Strong Bases

The weight of...

Question

The weight of HCl present in one litre of solution, if pH of the solution is one:

3.65g

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36.5g

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0.365g

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0.0365g

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Solution

The correct option is A 3.65g
$p H = - l o g [H^{+}] = 1$
$[H]^{+} = 0.1$ M
Thus 1 litre of solution contains 0.1 mole of HCl.
The molecular weight of HCl is 36.5 g
Thus 0.1 mole corresponds to 3.65 g.

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