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Standard XII

Chemistry

Auto Protolysis of Water

If the densit...

Question

If the density of water of a lake is $1.25$ g $m L^{- 1}$ and one kg of lake water contains $92$ g of $N a^{+}$ ions. Calculate the molarity of $N a^{+}$ ions in this lake water.
(At. mass of $N a$ $= 23$ g $m o l^{- 1}$ ).

5 M

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1 M

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2 M

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3 M

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Solution

The correct option is A 5 M

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If the density of water of a lake is 1.25 g mL−1 and one kg of lake water contains 92g of Na+ ions. Calculate the molarity of Na+ ions in this lake water.(At. mass of Na =23 g mol−1).

The correct option is A 5 M

If the density of water of a lake is $1.25$ g $m L^{- 1}$ and one kg of lake water contains $92$ g of $N a^{+}$ ions. Calculate the molarity of $N a^{+}$ ions in this lake water.
(At. mass of $N a$ $= 23$ g $m o l^{- 1}$ ).