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Vapour pressure of liquid solution

18 {~g} of glucose ({C}_{6} {H}_{12} {O}_{6}) is added to 178.

Question

Medium

Solving time: 3 mins

$18 g$ of glucose $(C_{6} H_{12} O_{6})$ is added to $178.2 g$ water. The vapour pressure of water (in torr) for this aqueous solution is

76.0

752.4

759.0

7.6

Views: 5,950 students

Updated on: Jun 20, 2023

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2016

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18 g

of glucose

(C_{6} H_{12} O_{6})

is added to

178.2 g

water. The vapour pressure of water (in torr) for this aqueous solution is

10 mins ago

Discuss this question LIVE

10 mins ago

Text solutionVerified

Vapour pressure of water

(p^{\circ}) = 760

torr Number of moles of glucose

= \frac{Mass ( g )}{Molecular mass ( g mol ^{- 1} )}

= \frac{18 g}{180 gmol ^{- 1}} = 0.1 mol

Molar mass of water

= 18 g / mol

Mass of water (given)

= 178.2 g

Number of moles of water

= \frac{Mass of water}{Molar mass of water} = \frac{178.2 g}{18 g / mol} = 9.9 mol

Total number of moles

= (0.1 + 9.9)

moles

= 10

moles Now, mole fraction of glucose in solution

=

Change in pressure with respect to initial pressure i.e.

\frac{Δ p}{p ^{\circ}} = \frac{0.1}{10}

Δ p = 0.01 p^{\circ} = 0.01 \times 760 = 7.6

torr

∴

Vapour pressure of solution

= (760 - 7.6)

torr

= 752.4

torr

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Question Text	$18 g$ of glucose $(C_{6} H_{12} O_{6})$ is added to $178.2 g$ water. The vapour pressure of water (in torr) for this aqueous solution is
Updated On	Jun 20, 2023
Topic	Solutions
Subject	Chemistry
Class	Class 12
Answer Type	Text solution:1 Video solution: 13
Upvotes	1572
Avg. Video Duration	6 min

$18 g$ of glucose $(C_{6} H_{12} O_{6})$ is added to $178.2 g$ water. The vapour pressure of water (in torr) for this aqueous solution is

Text solutionVerified

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18 g of glucose (C6​H12​O6​) is added to 178.2 g water. The vapour pressure of water (in torr) for this aqueous solution is

Text solutionVerified

Filo tutor solutions (13)

Questions from JEE Mains 2016 - PYQs

Practice questions from Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

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$18 g$ of glucose $(C_{6} H_{12} O_{6})$ is added to $178.2 g$ water. The vapour pressure of water (in torr) for this aqueous solution is