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14 Cards in this Set

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