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Ways to Define Concentration

What is the m...

Question

What is the molarity of the aqueous solution of methyl alcohol $(C H_{3} O H, m o l a r m a s s 32.0 g m o l^{- 1})$ which contains 64 g of methyl alcohol in 200 g of water?

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Solution

Molarity = $\frac{N o . o f m o l e s}{V o l u m e i n l i t e r}$

Density of water = $1$ g/ml

so, $200$ g of water = $200$ ml of water

molarity = $\frac{64 / 32}{0.2} = 10 m o l / l i t e r$

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