Name: __________________________________________________________________ Period:_______
Foul Water Lab
Purpose: To purify a sample of contaminated water using a variety of separation techniques.
Equipment:
Balance
Styrofoam cups
Magnet
Separatory funnel setup
Funnel
Filter paper
Distillation apparatus
Erlenmeyer flask
Bunsen burner setup
Iron ring stand
Ring Clamp
Wire gauze
Large Test Tube
Conductivity Tester
Procedure:
Everyday:
□1. Put on your safety goggle and laboratory apron.
□2. When finished, return all equipment to where it belongs (if not your bin) and clean your lab station.
□3. Wash your hands.
Step 1: Metal Removal
□1. Using a magnet, separate out all magnetic particles.
Step 2: Oil Removal
□1. Setup your separatory funnel by cutting the bottom portion off of your plastic bottle and by securing the
stopper with plastic tubing in the bottle mouth.
□2. Slide piece of metal wire into the tubing and secure clamp
□3. Pour your sample into the bottle and allow to sit without being disturbed so that the oil and water
separate fully.
□4. Open the clamp and allow the water to pass through the tube into a collection vessel. Use the metal wire
as needed to dislodge solids that clog the tubing.
□5. Close the clamp and stop collecting BEFORE the oil begins to go down the tube.
Step 3: Particulate Matter Removal
□1. Setup your ring stand with ring clamp and place funnel in clamp.
□2. Fold a piece of filter paper, place it in the funnel and dampen it with a little water so that it stays.
□3. Slowly pour your sample into the funnel taking care not to fill past where the filter paper is.
□4. Continue to add your sample and allow
Step 4: Soluble Matter Removal
□1. Setup a distillation apparatus.
□2. Pour your sample into a Erlenmeyer flask and cap with a stopper fitted with a bent glass tube.
□3. Gently heat the bottom of the Erlenmeyer flask so that your sample is producing steam or is gently
boiling. Do not overheat your sample or it might cause the glass tube to clog.
□4. Collect the steam in a large test tube and have your teacher test it for conductivity.
Data:
Data Table 1: Observations
Color
Clarity
Odor
Presence of
Oil
Presence of
Solids
Before
Treatment
After Step 1
After Step 2
After Step 3
After Step 4
Calculations:
1. Percent Recovery = Mass after Step 4
Initial Mass
* 100
Analysis and Conclusions:
1. Which step of the purification process was the most successful in removing contaminants?
2. During which step of the purification process was the largest portion of your sample removed?
3. Could any steps of the purification process be removed? If so, which ones? Explain.
4. For each step of the purification process, identify which contaminants were removed.
Mass