Question

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(K=1.86 C/mol/kg for water and i=1 for sugar

Answer 1

7.44 degrees C

Answer 2

Answer: The freezing point of water will decrease by 7.44 K.

Step-by-step explanation

Moles of sugar = 4 moles

Mass of water = 1 kg

i = van't Hoff factor of sugar = 1

`K_f= 1.86 K kg/mol`

`\Delta T_f=ik_f* molality`

`\Delta T_f=1* 1.86 K kg/mol* (4 mol)/(1 kg)=7.44 K`

`\Delta T_f=7.44 K`

The freezing point of water will decrease by 7.44 K. .