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Calculate the vapour pressure lowering of a 1M aqueous sucrose (sugar) solution at 25 oC where...

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Chemistry

Calculate the vapour pressure lowering of a 1M aqueous sucrose(sugar) solution at 25 oC where po(H2O) = 23 mm Hg. The density of1M sucrose at 25 oC is 1.129 g/mL.

The answer to this question is 0.51 mm Hg

Can you please explain how ti find this?

We know that vapour pressure lowering is DeltaP = X_b * P_A

but how do i find the mole fraction?

Can some one please explain this in detail

Thank you

Answer & Explanation Solved by verified expert
4.1 Ratings (538 Votes)
We have Mole fraction of sucrose moles of sucrose Molesof sucrose moles of water Lets calculate moles sucrose water in 1 L of 1 M sucrosesolutionWe know that Molarity No of moles of solute volume ofsolution    See Answer
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