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6 Cards in this Set
- Front
- Back
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What makes water hard |
Dissolved calcium or magnesium compounds |
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What is the difference between permanent and temporary hard water |
Temporary hard water will lose its hardness when heated Permanently hard water will never lose is hardness |
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How do we remove the calcium and magnesium from permanently hard water |
Ion exchange column |
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What is hard water |
Water which contains dissolved calcium or magnesium ions and does not form a lather with soap easily |
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How does the ion exchange column work |
There are lots of tiny plastic beads made of a special "resin" The calcium/magnesium ions displace the sodium ions attached to the resin and then attach to the resin molecules allowing the sodium to leave the column |
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What happens when the sodium ions in the ion exchange column run out |
Passing a sodium chloride solution (brine) through the column flushes the calcium and magnesium out and replaces them with sodium ions so it can be used again |
