Back to AI Flashcard MakerChemistry /GCSE Chemistry 11L1: Water
Which main ions make hard water?
Calcium and Magnesium
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Key Terms
Term
Definition
Which main ions make hard water?
Calcium and Magnesium
When calcium and magnesium ions react with soap what is made?
Scum
What is considered very hard water?
Above 200mg/l as calcium carbonate equivalent
How can you measure hardness of water?
Titration with soap solution
How can temporary hard water be softened?
Boiling
Can permanent hard water be softened?
No it stays hard even after boiling
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| Term | Definition |
|---|---|
Which main ions make hard water? | Calcium and Magnesium |
When calcium and magnesium ions react with soap what is made? | Scum |
What is considered very hard water? | Above 200mg/l as calcium carbonate equivalent |
How can you measure hardness of water? | Titration with soap solution |
How can temporary hard water be softened? | Boiling |
Can permanent hard water be softened? | No it stays hard even after boiling |
What are 3 benefits of drinking hard water? |
|
What are two methods for softening water? |
- using ion exchange column |
Does soft water or hard water form a permanent lather easily when mixed with soap? | Soft water |
What is temporary hard water caused by? | Dissolved calcium hydrogencarbonate |
Which type of water needs a lot of soap to form a permanent lather? | Hard |
Which group is calcium in? | Group 2 |