Chapter 29- Water Hardness Flashcards
1
Q
How is hard water formed
A
Passed through limestone and picks up calcium and magnesium ions
2
Q
Problems of hard water
A
Ðeposits limescale
Solved by
Boiling
Distillation
Ion exchange
3
Q
Describe ion exchange
A
Hard water passed down through ion exchanger
Calcium ions are swapped for sodium ions
Soft water comes out (containing sodium ions)
4
Q
Hard water
A
Water that does not lather with soap
Instead forms scum
Caused by calcium and magnesium ions