If pH of the solution is one, what weight of HCl present in one litre of solution?

Question

If pH of the solution is one, what weight of HCl present in one litre of solution? (A) 3.65 g (B) 36.5 g (C) 0.365 g (D) 0.0365 g

Tardigrade Admin · Accepted Answer

pH =1 pH=- log [H+] ⇒[H+]=10-pH 10-1 M =10-1 moles/lit The mass of 1 mole of a substance in grams is called its molar mass. Hence, (molar mass of HCl is 36.5) 1 mole HCl =36.5 g 1 mole HCl =36.5 × .1=3.65 g

Q. If pH of the solution is one, what weight of $H Cl$ present in one litre of solution?

3.65 g

36.5 g

0.365 g

0.0365 g

$p H = 1$
$p H = - lo g [H^{+}] \Rightarrow [H^{+}] = 1 0^{- p H}$
$1 0^{- 1} M = 1 0^{- 1}$ moles/lit
The mass of $1$ mole of a substance in grams is called its molar mass.
Hence, (molar mass of $H Cl$ is $36.5) 1$ mole $H Cl = 36.5 g$
$1 m o l eH Cl = 36.5 \times .1 = 3.65 g$

Q. If pH of the solution is one, what weight of HCl present in one litre of solution?