RePORT OF CHEMISTRY EXPERIMENtSolution colligative properties

Gorup :

Dian Muflikhy Putri (06)

Dinda Amrul M (07)

Dyah Listya N (09)

Karunia Sholichah (16)

Nuzul Arif Kurniawan (25)XII IPA 7

2010 Goal:To study the influence of concentration and kind of dissolved substance to the freezing point. Tool and material :Thermometer

(1 pcs)

Reaction tube

(5 pcs)

Drop pipette

(2 pcs)

Pail

(1 pcs)

Ice-tube

NaCl 0,1 M

NaCl 1 M

Glucose 1 M

Glucose 0,1 M

Water

Table

NoDissolved substanceFreezing point solution ((C)Majority between freezing point of water and solution ((C)

1Water00

2Glucose 0,1 M-11

3Glucose 1 M-22

4NaCl 0,1 M-33

5NaCl 1 M-44

Question :

1. How is the freezing point solution beside the freezing point solvent?

2. How is the relation between decreasing freezing point solution with concentration?

Answer :1. Freezing point of solution is lower than the freezing point solvents.2. The greater the concentration, the lower the freezing point of solution Conclusion: The addition of solutes caused a decrease in vapor pressure. This causes the freezing point of solution is much lower when compared to the freezing point of pure solvent. The more concentrated a solution, then also the lower the freezing point of the solution. electrolyte solution has a number of particles greater than non electrolyte solution. Since the number of particles is more, an electrolyte solution has a lower freezing point than non electrolyte solution. Addition of salt to the ice, so ice does not melt quickly, because the addition of salt lowers the freezing point.

Measurement of temperature using a thermometer, on every solution that has been frozen