Experiment 1 Mixtures

Experiment 1: Mixtures

Aim: To develop an understanding of different types of mixtures including solutions and to examine the different solubilities of some solutes in two solvents: water and ethanol

Procedure: Refer to Experiments Book Pg 13

Results:
Part A-

Mixture
Observations
Classifications
1
100% Orange Juice
There were suspended pulp in the juice
Heterogeneous Mixture
2
100% Apple Juice
Clear solution
Homogeneous Mixture
3
Solder
Uniform mixture
Homogeneous Mixture
4
Fruit Cake
Chunks of raisins and nuts can be seen
Heterogeneous Mixture

Part B-
Predict: A saturated solution will form
Observe: The salt does not get dissolved completely in the water but forms a saturated solution
Explain: The water can only dissolve 35.9g/100ml in 25°C however the temperature of the water was unstable due to the fact that the experiment room was air conditioned and thus decreasing the temperature of the water.

Part C-
Solute
Soluble (?)

Water (solvent)
Ethanol (solvent)
Charcoal
No
No
Sodium Chloride
Yes
No
Copper (II) Chloride
Yes
Yes
Ethanol
Yes
-
Water
-
Yes

Processing of results:

1a. To make an unsaturated solution simply add less than 35.9g of sodium chloride to the water
b. To make a saturated solution you would have to add exactly 35.9g of sodium chloride so that the solute can no longer dissolve in the water
c. To make a supersaturated solution, you have to heat the water up in order to dissolve it then cooling it down so it would hold more solute than it usually can dissolve

2. Yes, as the temperature was increased the water was able to dissolve more sodium chloride as the solubility of the salt increases as the temperature of the water increases. Thus, when cooled down the water contained more water than it would usually contain.
3. When referring to solubility in blood we mean basically solubility in water which for oxygen is 9mg/L (milligrams per litre) and for carbon dioxide it is much higher at 1450g/L so carbon dioxide is about 160 times