At 2 5 ∘ C , the vapour pressure of water increases from 30 mm Hg to 31 mm Hg on increasing the external pressure up to 10 atm . If the vapour pressure of water is to be maintained at 30 mm Hg at 2 5

Question

At 2 5 ∘ C , the vapour pressure of water increases from 30 mm Hg to 31 mm Hg on increasing the external pressure up to 10 atm . If the vapour pressure of water is to be maintained at 30 mm Hg at 2 5 ∘ C and 10 atm external pressure, how many gram NaCl should be added per kg of water?

TestHub · Accepted Answer

Concepts: Raoult's Law, colligative properties, vapor pressure lowering. Solution: Use Raoult's Law to find moles of NaCl needed to lower vapor pressure by 1 mm Hg. Mass NaCl = 54.16 g.

Chemistry - Ideal Gas Question with Solution | TestHub

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