Water Flashcards
1
Q
How is limescale formed
A
When hard water is heated
2
Q
How is water treated to make it safe to drink?
A
Removing solids and micro organisms Water source filters solids Sedimentation of small particles using aluminium Filtering of fine sand Chlorine disinfects
3
Q
Issues about fluoride surrounding treatment or water
A
Linked to tooth staining, bone disease and pain
Forces people to consume fluoride when they drink tap water
4
Q
How is hard water formed
A
Contains compounds such as calcium or magnesium which are dissolved when water passed through rocks
5
Q
What is a property of ionic compounds?
A
Soluble
6
Q
How is scum formed
A
When hard water reacts with soap
7
Q
What is scale
A
Limescale which is calcium carbonate
8
Q
Soft water equals what
A
Easy lather
9
Q
Hard water equals what
A
Less lather
10
Q
What is distillation
A
Pure water
11
Q
Wha does carbon do to water
A
Reduces chlorine levels
Ion exchange resin
12
Q
What does silver do to water
A
Discourages bacterial growth on filter
