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14 Cards in this Set
- Front
- Back
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Most insoluble substances are soluble. True/False
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True
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Are many covalent compounds soluble in water?
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No
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What is a saturated solution?
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Where the maximum amount of solute will dissolve in a solution at a given temperature.
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When the temperature increases, the solubility of solids increases/decreases
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increases
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As the temperature rises, what happens to the solubility of gasses?
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It decreases
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What do solubility curves show?
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How the solubility of a substance changes with temperature
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What ions does hard water contain?
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Calcium and magnesium salts
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How is scum formed?
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When the calcium or magnesium ions in hard water react with soap and form the precipitate scum
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Ca/Mg decompose to form _____ when the water is heated
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scale
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Hard water is beneficial/detrimental to human health?
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beneficial
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How can hard water be softened?
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By removing the salts that produce scum and scale. This can be achieved by adding washing soda or using an ion-exchange resin to remove the ions
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What would you expect drinking water to have little of?
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Dissolved substances and microorganisms
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How is water made fit to drink?
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By adding chlorine to kill bacteria
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How can you make pure water?
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By distilling it
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