Chapter 29- Water Hardness Flashcards

1
Q

How is hard water formed

A

Passed through limestone and picks up calcium and magnesium ions

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2
Q

Problems of hard water

A

Ðeposits limescale

Solved by
Boiling
Distillation
Ion exchange

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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)

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4
Q

Hard water

A

Water that does not lather with soap

Instead forms scum

Caused by calcium and magnesium ions

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