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Molarity

What is the m...

Question

What is the molarity of H₂SO₄ solution that has a density of 1.84 g/cc and contains 98% by mass of H₂SO₄

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Solution

1. Molarity is the number of moles of solute present in 1 Liter of its solution.
2. The solution contains 98% $H_{2} S O_{4}$ by weight/mass.

3. That means 100 ml of solutions contains 98 grams of $H_{2} S O_{4}$

4.Number of moles of $H_{2} S O_{4}$ = $\frac{W e i g h t o f H_{2} S O_{4}}{M o l e c u l a r m a s s o f H_{2} S O_{4}}$ = 98/98 = 1 mole
5. $M o l a r i t y = \frac{N u m b e r o f s o l u t e}{V o l u m e o f s o l u t i o n i n L i t e r}$
6. So molarity = $\frac{1}{100} \times 100 = 10 M$

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