Prepare a stock solution. Pour 1 liter of distilled water into a graduated cylinder with 10 grams of alum. The stock solution is the chemical you are testing for its effectiveness in removing particles during the jar test.
Pour 1 liter of raw water into each jar.
Label the jars 1, 2, 3 and 4.
Create a chart using a piece of paper. Write down each jar number. Next to each jar number, write the corresponding amount of alum you will be putting in the jar. For this example, put 1 mL in the first jar, 2 mL in the second, 3 mL in the third and 4 mL in the fourth.
Pour stock solution into the test tube according to the amount you wrote on your chart for the first jar. Pour the solution into the first jar.
Stir the solution for 15 minutes at a steady pace.
Repeat Steps 5 and 6 for each of the other three jars.
Examine the jars and record your results. Check for noticeable differences in the clarity of the water.