✦ New Age Learning 🔍
Home › Library › Science Lab - Advance 3 › Experiment 13 — Soap, Detergent and Hard Water

🧪 Lab 14 of 21 · Science Lab - Advance 3 · Class 10

Experiment 13 — Soap, Detergent and Hard Water

Try it in the interactive lab🔊 Audio

Topic: Chemistry · Class 10 · Carbon compounds: cleansing action, soaps and detergents

Aim: Get a good lather in the sample of hard water.

Daily: If your washing leaves a grey scum and your tap has white deposits, your water is hard. That is why detergents exist and why washing machines specify them.

Question: Why does soap fail to lather in hard water?

Exp: The insoluble calcium and magnesium salts of soap form scum instead of lather.

Question: A micelle has its hydrophobic tails pointing…

Exp: The heads face the water.

Question: Detergents work in hard water because their calcium salts are…

Exp: Bicarbonates precipitate on boiling.

Exp: Made by saponification of fats with alkali.

All activities in Science Lab - Advance 3

  1. What Next? Careers in Science
  2. Experiment 1 — Verify Ohm’s Law
  3. Experiment 2 — Series or Parallel?
  4. Experiment 3 — Choose the Right Fuse
  5. Experiment 4 — Make the Coil Spin
  6. Experiment 5 — Make Electricity from Movement
  7. Experiment 6 — Find the Image
  8. Experiment 7 — Correct the Vision
  9. Experiment 8 — Balance the Equation
  10. Experiment 9 — Read the pH
  11. Experiment 10 — Win the Metal from Its Ore
  12. Experiment 11 — Ionic or Covalent?
  13. Experiment 12 — Build a Carbon Compound
  14. Experiment 13 — Soap, Detergent and Hard Water
  15. Experiment 14 — Spot the Reaction Type
  16. Experiment 15 — Trace the Blood
  17. Experiment 16 — The Reflex Arc
  18. Experiment 17 — Which Way Will It Grow?
  19. Experiment 18 — From Pollen to Seed
  20. Experiment 19 — Mendel’s Peas
  21. Experiment 20 — Who Decides the Sex of the Child?

Practise for Class 10