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The density of 20% (w/w) aqueous NaOH solution is 1.20 g.mL–1. What is the mole fraction of water ?(molar mass of NaOH = 40g.mol–1)

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Detailed Solution

For the given solution, d=1.2 g/ml Wsolute= 20g ; Wsol.= 100gm Wsolvent= (100 - 20) =80gm

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The density of 20% (w/w) aqueous NaOH solution is 1.20 g.mL–1. What is the mole fraction of water ?(molar mass of NaOH = 40g.mol–1)