1. Foul water lab
Your objective is to clean up a sample of foul water, producing as much “clean water” as possible, to a point where it could be used for hand-washing. (Caution: Do not test any water samples by drinking or

2. Materials Measuring cylinder Erlenmeyer flask Ring stand Funnel
Filter paper
Glass rod
Pipette
Disposable cup
Paper clip
Sand
gravel

3. Precautions foul water lab
Follow all lab safety rules
Protect eyes and skin
No horse play
Know the procedure for the lab before starting
Report accidents and broken glass will be disposed off by the teacher
Wash the graduated or measuring cylinder after each purification

4. Precautions foul water lab continued
Check for any broken or chipped equipment. If any of your equipment is dirty please clean it with soap and water.
Do not pour any sand or gravel into the sink!)
Waft to smell
Do not taste the cleaned and purified water
Wash your hands with soap and water at the end of the experiment

5. Oil separation
Allow the sample of water to sit in the graduated cylinder for a minute before removing the oil
Dispose of the oil in the container provided by the teacher

6. Sand Filtration
Add pre-moistened gravel and sand layers to the cup as shown in Figure 1.6 in your textbook
Gently pour the sample to be filtered into the cup. Catch the filtrate in a beaker as it drains through.
Dispose of the used sand and gravel in the trash can (Caution: Do not pour any sand or gravel into the sink!)
Observe the properties of the filtered water sample and measure its volume.
Record your results. Save the filtered water sample for the next procedure.

7. Gravel ss
Moistened
Sand
Gravel
Use a paper clip to make a hole

8. Charcoal Adsorption Teacher will add charcoal to the filtered water
Stir
filter 1.

9. Post lab data anlaysis