Good for heart, good for teeth and bones, tastes better
2 of 6
Now the disadvantages... (3 marks)
Produces yucky scum, reduces efficiency of kettles/pipes, need to buy lots of soap
3 of 6
Why do you need to buy more soap? (1 mark )
Hard water doesn't lather easily
4 of 6
Give a detailed method of measuring hardness (6 marks!)
1. Put water in a conical flask. 2. Add soap solution to a burette. 3. Slowly add soap to the flask. 4. Swirl the mixture to help it lather. 5. Stop adding soap when a lather forms. 6. Record amount of soap needed. More soap=harder
5 of 6
How can you soften water (2/3 marks)
Ion exchange column. Hard ions are swapped for soft ions e.g. sodium
6 of 6
Other cards in this set
Card 2
Front
What are the advantages of hard water (3 marks)
Back
Good for heart, good for teeth and bones, tastes better
Card 3
Front
Now the disadvantages... (3 marks)
Back
Card 4
Front
Why do you need to buy more soap? (1 mark )
Back
Card 5
Front
Give a detailed method of measuring hardness (6 marks!)
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