Water is a solvent and mnay compounds can dissolve in it
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What determines whether whether it is hard or soft?
The amount of compounds present in the water
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Most hard water contains what?
Calcium or magnesium compounds
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What do calcium and magnesium compounds do?
dissolve in natural water that flows over ground or rocks containing compounds of these elements
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This is because...?
the calcium and/or magnesium ions in hard water react with soap
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Why is it better to use soapless detergents instead of soap in hard water areas?
the do not react with ions in hard water
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Why is it better to use soapless detergents instead of soap in hard water areas?
no 'scum' is produced
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Is this statment: 'they are not designed to be used for a variety of conditions' a reason why it is better to use soapless detergents in hard water?
False
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Is this statment: 'they contain one or more surfactant, which means that there will always be a foam to clean with' a reason why it is better to use soapless detergents in hard water?
True
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Other cards in this set
Card 2
Front
What determines whether whether it is hard or soft?
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