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If the density of some lake water is 1.2...

If the density of some lake water is `1.25 g mL^(-1)` and contains `92g` of `Na^(+)` ions per `kg` of water, calculate the molality of `Na^(+)` ions in the lake.

Text Solution

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Molar mass of `Na=23 " g mol"^(-1)`
`therefore ` No. of moles of `Na^(+)` ions present
`=(92)/(23)=4 ` moles
`therefore "Molality"=(4xx1000)/(1000)=4 m`
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