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Card 6
Front
What are the disadvantages of scale?
Back
Card 7
Front
What is the difference between scale and scum?
Back
Card 8
Front
Why is it better to drink hard water than soft water?
Back
Card 9
Front
How is hard ward water made soft?
Back
Card 10
Front
How is temporary hard water softened?
Back
Card 11
Front
What ions do temporary hard water contain?
Back
Card 12
Front
What does hydrogencarbonate decompose to?
Back
Card 13
Front
What is produced when carbonate ions from decomposed hydrogen carbonate react with magnesium and calcium ions?
Back
Card 14
Front
Aside from heating, what are the 2 other ways of softening hard water?
Back
Card 15
Front
How does sodium carbonate (washing powder) soften hard water?
Back
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