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10
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What does "soluble" mean? Explain with an example
Sugar can dissolve in water. It is soluble in water.
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heart
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seesaw
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fairy
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25
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lifesaver
Give 25 points!
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15
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What's an endothermic reaction?
A reaction that absorbs heat (energy)
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10
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When pure silver (Ag) tarnishes, it becomes Silver Sulfide (AgS). What kind of reaction do you think this is NOT? Why?
Decomposition
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15
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Which of these mixtures has the substances mixed the most closely (+ most stable)? Colloid, heterogenous mixture, suspension, solution, emulsion
Solution
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15
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Name 4 different ways to separate a mixture. Provide an example where you would use one of them.
Magnetism, sifting, filtration, buoyancy, evaporation, distillation
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10
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The solubility of salt in water is 357g/L. What does this mean?
The max amount of salt that can dissolve in a liter of room temperature water is 357 grams - after that, salt will start to settle on the bottom.
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5
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What's a way to increase solubility of a substance?
Heat
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10
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Give an example of a solid solution, liquid solution, and gas solution.
Solid: 14k gold, steel, bronze... Liquid: saltwater, sugar water, vinegar, tea, coffee, etc. Gas: air, smoke, etc.
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15
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When a gas substance is cooled, what happens to its particles? Show using words and a picture.
...
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10
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What happens during a replacement reaction?
Elements in compounds switch around.
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boom
Lose 50 points!
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rocket
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rocket
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baam
Lose 15 points!
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5
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Many things can dissolve in water. For that reason, water is sometimes called the universal _______.
Solvent
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lifesaver
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shark
Other team loses 20 points!
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rocket
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thief
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25
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seesaw
Swap points!
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shark
Other team loses 25 points!
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gift
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banana
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5
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In a solution, the substance that the solute dissolves in is called __________
the solvent
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