Flashcards
Hard Water
Cards in this deck (9)
- 1How do you know if your water is hard?There won't be any lather and the soap will just react with water to make scum
- 2What does hard water contain?Calcium ions, magnesium ions or both
- 3What does calcium carbonate form when reacting with acid rain?Calcium hydrogencarbonate
- 4Is calcium hydrogencarbonate soluble?Yes
- 5What are the two types of hardness?Temporary and permanent
- 6How is temporary hardness caused?By calcium hydrogencarbonate
- 7How is permanent hardness caused?By dissolving calcium sulphate
- 8How is temporary hardness removed?By boiling. The calcium hydrogencarbonate decomposes to form insoluble calcium carbonate
- 9How is both temporary and permanent hardness removed?By using ion exchange resin. Sometimes a water supply is fed through an ion exchange resin to remove the hardness
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- Year 11 Chemistry Flashcards on Hard Water, created by Himavi Perera on 26/02/2017.
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- Himavi Perera
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