Experiment 1 - Homogenous and Heterogenous Mixtures
Experiment 1: Mixtures
Aim: To develop an understanding of different types of mixtures including solutions and examine the different solubilities of some solutes and two solvents: water and ethanol
Equipment
Bunsen burner
Tripod
Gauze mat
Beakers (2 x 100mL)
Boiling chips
Distilled water
Sodium chloride
Sodium chloride (solid)
Glass rod
Measuring cylinder (25mL)
Ethanol
Watch glass
Thermometer
100% Orange Juice
100% Apple Juice
100% Prune Juice
Solder
Fruit Scone
Charcoal
Copper(II) Chloride
Magnifying glass
Procedure
A. Homogenous or Heterogenous
1. Examine 5 mixtures and record your observations in a table similar to the one drawn below
2. Classify the mixtures as either homogenous or heterogenous
B. Solutions
1. The salt, sodium chloride, has a solubility of 35.9g/100mL at 25 C. Determine the amount of salt that you would need if only 15mL of distilled water solvent was used. (5.885 g)
2. Using the measuring cylinder, measure and pout the 15mL of distilled water into one of the 100mL beakers. Measure and record the temperature of the water.
3. Weigh the calculated amount of sodium chloride that was previously calculated and attempt to dissolve it in 15mL of distilled water at room temperature
4. If necessary, gently heat your water, with continuous stirring to dissolve any remaining solid. Stop heating the water once you are convinced all solid has dissolved or when boiling is about to occur. Describe and record your observations including the temperature of the water
5. Remove any stirring implement but leave the thermometer in the water and allow it to cool. Be very careful not to touch or bump the beaker or thermometer
C. Solubility
1. Test the solubility of a small sample (half a teaspoon) of ethanol, charcoal, sodium chloride and copper(II) chloride in separate 15mL lots of distilled water. Record your observations and classify each sample as soluble or insoluble in the water solvent column of a table similar to that shown
2. Test the solubility of a
Aim: To develop an understanding of different types of mixtures including solutions and examine the different solubilities of some solutes and two solvents: water and ethanol
Equipment
Bunsen burner
Tripod
Gauze mat
Beakers (2 x 100mL)
Boiling chips
Distilled water
Sodium chloride
Sodium chloride (solid)
Glass rod
Measuring cylinder (25mL)
Ethanol
Watch glass
Thermometer
100% Orange Juice
100% Apple Juice
100% Prune Juice
Solder
Fruit Scone
Charcoal
Copper(II) Chloride
Magnifying glass
Procedure
A. Homogenous or Heterogenous
1. Examine 5 mixtures and record your observations in a table similar to the one drawn below
2. Classify the mixtures as either homogenous or heterogenous
B. Solutions
1. The salt, sodium chloride, has a solubility of 35.9g/100mL at 25 C. Determine the amount of salt that you would need if only 15mL of distilled water solvent was used. (5.885 g)
2. Using the measuring cylinder, measure and pout the 15mL of distilled water into one of the 100mL beakers. Measure and record the temperature of the water.
3. Weigh the calculated amount of sodium chloride that was previously calculated and attempt to dissolve it in 15mL of distilled water at room temperature
4. If necessary, gently heat your water, with continuous stirring to dissolve any remaining solid. Stop heating the water once you are convinced all solid has dissolved or when boiling is about to occur. Describe and record your observations including the temperature of the water
5. Remove any stirring implement but leave the thermometer in the water and allow it to cool. Be very careful not to touch or bump the beaker or thermometer
C. Solubility
1. Test the solubility of a small sample (half a teaspoon) of ethanol, charcoal, sodium chloride and copper(II) chloride in separate 15mL lots of distilled water. Record your observations and classify each sample as soluble or insoluble in the water solvent column of a table similar to that shown
2. Test the solubility of a