Question #192312

đź”ąBOILING POINT AND FREEZING POINT OF SOLUTION

1. a solution is made of 2.00g sucrose in 100.00 g H2O. (Molecular weight of sucrose is 342 g/mol). Calculate the (a) Boiling point and (b)Â freezing point of the solutionÂ

đź”¸OSMOTIC PRESSUREÂ

1. What is the osmotic pressure of a solution made up of 2.00g sucrose (C12H22O11) in 100mL of solution at 30Â°C?Â

Expert's answer

**1**.Sucrose mass = 2g

Molar mass of sucrose=342g/mol

No. of moles of sucrose "=\\dfrac{2}{342}=0.0005847"

Mass of water= 100g

Molar mass of water = 18g/mol

Number of moles of water "=\\dfrac{100}{18}=5.55 mol"

So using rault's law-

Â Â "\\dfrac{31.8-P_s}{31.8}=\\dfrac{1.14}{32.94}"

"31.8-P_s=1.1005\n\n\n\\\\[9pt]\n p_s=30.6995 mm hg"

**2.**

**Osmotic pressure-**

"\\Pi= csT"

"=\\dfrac{2}{100}\\times 1000\\times 0.0821\\times 303\n\\\\[9pt]\n =498.34 mm hg"

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