review: solubility means how much of a certain kind of solid will dissolve in a certain kind of...
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Review:
Solubility means how much of a certain kind of solid will dissolve in a certain kind of liquid
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Different things affect how quickly a solid will dissolve in a liquid.
Stirring, crushing, and shaking a solid mixed with a liquid will all make the solid dissolve faster
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Let's practice:
#1) You pour one teaspoon of salt into two glasses of water. You stir one of the glasses for 1 minute, and leave the other glass. You time how long it takes for all of the salt to dissolve. Which glass will take longer?
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#2) You take 10 grams of sugar and split it in half. You crush 5 of the grams to a powder, and leave the other 5 grams as they are. Then you pour them into two glasses of water. Which glass will the sugar dissolve in first?
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There is only one thing that actually changes how much solid will dissolve.
When you heat a liquid, solubility increases. More solid will dissolve in a hot liquid than a cold one.
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Let's practice
#1) You add sugar to a hot cup of water and a cold cup of water. Which will hold more sugar?s
#2) You add sugar to a cup of tea, but not all the sugar dissolves. You put the tea in the microwave for 30 more seconds. What do you expect to see?
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Quiz Game
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1. What are the 3 things that will affect how quickly a solid will dissolve in a liquid?
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2. What is the only thing that will affect how much of a solid will dissolve in a liquid?
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3. James does a experiment where he puts salt in hot and cold water. In which glass should more salt dissolve?
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4. Max adds sugar to two glasses of ice tea. He stirs one glass but does not stir the other. In which glass will the sugar dissolve faster?
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5. True or False: Cooling a liquid down will make a solid dissolve faster in the liquid?
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6. Liz added salt to her soup, what can she do to make the salt dissolve faster?
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7. When you heat something up, do the atoms move faster or slower?
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8. When you heat a liquid, does solubility increase or decrease?
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9. What are different kinds of atoms called?
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10. What are the three parts of an atom?
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11. What is a molecule?
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12. What is the boiling point?
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13. What are the three things that make a solid dissolve faster?
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14. What can you do to make more of a solid dissolve?