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27) A solution is made by dissolving 13 g of sucrose, C12H22O11, in 117 g of water, producing asolution with a volume of 125 mL at 20°C. What is the expected osmotic pressure at 20°C? A)10 atm   B)14 atm     C)58 atm     D)7.3 atm

Question

27) A solution is made by dissolving 13 g of sucrose, C12H22O11, in 117 g of water, producing asolution with a volume of 125 mL at 20°C. What is the expected osmotic pressure at 20°C?

 

A)10 atm   B)14 atm     C)58 atm     D)7.3 atm

check_circleAnswer
Step 1

Given:

Mass of sucrose = 13 g.

Volume of water = 117 mL = 0.117 L.

Molar mass of sucrose = 342 g/mol.

Volume of solution = 117 mL = 0.117 L.

Temperature T = 20℃ = 20+273K = 293K.

Step 2

Osmotic pressure can be calculated as:

п 3 МXRхТ
Where,
M molarity
T absolute temperature
R gas constant
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п 3 МXRхТ Where, M molarity T absolute temperature R gas constant

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Step 3

Number of moles of solute...

mass
number of moles
molar mass
13 g
number of moles= 342 g/mol
number of moles
0.0380 mol.
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mass number of moles molar mass 13 g number of moles= 342 g/mol number of moles 0.0380 mol.

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