Question

CHALLENGE
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The formula weight of h2so4 is 98 the weight of the acid in 400 ml of o.1 molarity solution is .
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Answer 1

Hi !

Solution :-

Given molecular weight of H2SO4 is 98
Wt of acid = 400 ml or 0.4 L
Molarity = 0.1

We know that

Molarity= mole / volume (L)

0.1 = mole / 0.4

mole = 0.4× 0.1 = 0.04

Now, we also know

Mole = mass /molecular wt

•°• 0.04 = mass / 98 [molecular wt of H2SO4 is 98]

0.04 × 98 = mass of H2SO4

3.92 g = mass of H2SO4

Hence, Answer is 3.92 gm

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Hope it helps you !!!


@Rajukumar111 ________

Answer 2

$\huge\textbf\green{Answer :}$

Number of moles of H2SO4 in 400 ml of 0.1M solution = $\frac{molarity\:x\:Volume}{10000}$

= $\frac{0.1\:x\:400}{1000}$

Weight of H2SO4 = $number\:of\:moles$ × $formula\:weight\:of\:H2SO4$

= $0.04$ x $98$

= $\huge\textbf{3.92 g}$

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