Hardness of water Quiz - Chemistry Module 6.

HideShow resource information
  • Created by: SashaAS
  • Created on: 12-06-13 12:53

1. How would you carry out an experiment to compare hardness of water samples?

  • Add 100cm3 of sample water to a conical flask. Under a microscope cound the number of ions present and record their number.
  • Add 100 cm3 of sample water to a conical flask. Add 1cm3 soap solution to the water, put a bung in and shake. Repeat until a good lasting leather is formed ( bubbles cover the surface for atleast 30 seconds). Record how much soap was used.
  • Add 100 cm3 of sample water to a conical flask. Taste it and record the flavour.
  • Add 100cm3 of sample water to a conical flask. Boil the water to 105 degrees celcius. Let it evapourate. Measure the amount of limescale produced.
1 of 8

Other questions in this quiz

2. Which ions cause hardness in water?

  • Hydrogencarbonate ions in Calcium/Magnesium hydrogencarbonate
  • Carbonate ions in Calcium/Magnesium carbonate
  • Nitrate ions in Calcium/Magnesium Nitrate

3. What causes permanent hardness in water?

  • Dissolved Nitrate molecules
  • Dissolved Calcium Suphate molecules
  • Dissolved Lead molecules
  • Dissolved Zinc molecules

4. What is limescale?

  • Calcium Nitrate
  • Calcium Carbonate
  • Calcium Sulphate

5. Which is the correct word equation for the creation of calcium hydrogencarbonate?

  • carbon dioxide + water + calcium carbonate > Calcium hydrogencarbonate
  • carbon dioxide + hydrogen gas + calcium carbonate > calcium hydrogencarbonate
  • carbon monoxide + water + calcium carbonate > calcium hydrogencarbonate
  • carbon + water + calcium carbonate > calcium hydrogencarbonate

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Water hardness and solubility resources »