Water Flashcards
1
Q
How to test for water using anhydrous substances
A
By adding water to solid copper the powder will turn from white to blue
2
Q
How to test for water using anhydrous cobalt
A
If there is water present the powder will turn from blue to pink
3
Q
How to test for the purity of water
A
Checking the boiling and melting points
4
Q
Why is distilled water used in practical experiments
A
It contains less impurities
5
Q
Substances found in water
A
Oxygen, metal, microbes, nitrates and phosphates
6
Q
Advantages of water supply
A
Dissolved oxygen supports marine life
7
Q
Disadvantages of water supply
A
Metal compounds toxic, plastics harming animals, microbes causing diseases
8
Q
Describe the purification of domestic water
A
Filtration to remove solids, chlorine to kill microbes
