Question

The osmotic pressure of a solution containing 10 g of cane sugar dissolved in 100 mL of water at 70°C is ____________.

पर्याय

• 724 atm

• 824 atm

• 8.23 atm

• 7.21 atm

Answer 1

The osmotic pressure of a solution containing 10 g of cane sugar dissolved in 100 mL of water at 70°C is 8.23 atm.

Explanation:

van't Hoff's equation is

πV = nRT

π = Osmotic pressure

V = Volume of the solution

n = Number of moles

R = Ideal gas constant

T = Temperature

∴ π = `"n"/"V" xx "RT"`

= `(10  "g")/(342  "g/mol") xx (0.0821  "L atm K"^-1  "mole"^-1 xx (273 + 70) "K")/(0.1  "L")`

π = `(10 xx 0.0821 xx 343)/(342 xx 0.1)` atm

= 8.23 atm