Name: ______

Test for Chlorine

Warning:

Chlorine is poisonous and will stain your clothes!!!

  1. Setup.
  2. Place 10 drops of bleach solution into cup 1.
  3. Place 10 drops of distilled water in cups 2-5.
  4. Perform four step-by-step dilutions of the Chlorine solution in cups 2-5. Make each dilution a 1-in-10 (or 1/10) dilution.
  5. Place 1 drop of cup 1 into cup and stir. Clean your dropper.
  6. Place 1 drop of cup 2 into cup 3 and stir. Clean your dropper.
  7. Repeat with cups 4 and 5.
  8. Add 10 drops of pool water to cup 6.
  9. Add 10 drops of tap water to cup 7.
  10. Add 10 drops of distilled water to cup 8.
  11. Tear the litmus papers into 8 equal pieces.
  12. Determine the Chlorine level and pH.
  13. Add 1 drop of Chlorine test solution to each cup and record the Chlorine levels in the chart.
  14. Drop a small piece of litmus paper into each cup and record the results.

Cup 1 / Cup 2 / Cup 3 / Cup 4 / Cup 5 / Cup 6 / Cup 7 / Cup 8
1 to 1
chlorine solution / 1 to 10 chlorine solution / 1 to 100 chlorine solution / 1
to
1000 / 1
to
10000 / Pool water / Tap water / Distilled water

Test for Chlorine

(datasheet)

Cup

/ Substance / Chlorine Test Results in ppm / Acid or Base?
1 / 1 to 1
chlorine solution
2 / 1 to 1
chlorine solution
3 / 1 to 100
chlorine solution
4 / 1 to 1000
chlorine solution
5 / 1 to 10000 chlorine solution
6 / Pool Water
7 / Tap Water
8 / Distilled Water
  1. If a solution is 1 ppm of chlorine, that means that there is ___ chlorine atom for every one-million water molecules.
  2. If a solution is 0.5 ppm of chlorine, that means that there is 1 chlorine atom for every ______water molecules.
  3. If a solution is 3 ppm of chlorine, that means that there is ___ chlorine atoms for every ______water molecules.
  4. Which cup is the control variable in the chlorine test? ______
  5. Pool water should be between 1.0 and 3.0 ppm chlorine. Was your sample acceptable? ______
  6. What is your concern if the concentration of chlorine in pool water is too low? ______
  7. What is your concern if the concentration of chlorine in pool water is too high? ______
  8. Tap water should be between 0.2 and 0.5 ppm chlorine. Was your sample acceptable? ______
  9. What is your concern if the concentration of chlorine in tap water is too low? ______
  10. What is your concern if the concentration of chlorine in tap water is too high? ______