7.1, 7.2, 7.3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Define a mixture. | 2 or more substances that are combined
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| Define solution | A well-mixed mixture that contains a solvent (biggest portion) and a solute (smallest portion).
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| What is a solvent and give an example? | largest part of a solution.
Example: water in a soft drink
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| What is a solute and give an example? | smallest part of a solution
Example: sugar in a soft drink
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| Name the universal solvent. | water
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| What is a colloid and give an example? | A mixture that contains small, undissolved particles that do not settle out.
Examples: fog, milk, mayonnaise, cool whip
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| Define suspension and give an example. | A mixture that has particles big enough to see.
Example: orange juice with pulp
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| Why would a car owner put coolant in his car? | The coolant is a solute that will lower the freezing point and raise the boiling point of a solvent. The coolant will absorb more of the heat given off by the running engine so it will not overheat. It will keep the car from freezing, too.
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| Why is water the universal solvent? | Most things that can be dissolved can be dissolved by water.
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| Which part of a solution is present in the largest amount? | solvent
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| Which part of a solution is present in a smaller amount? | solute
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| What's the difference between a suspension and a solution? | A suspension will have more settled at the bottom than a solution.
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| What does a solute do to the boiling point of a solvent? | It raises the boiling point.
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| Dilute solution? | a solution with only a little solute in it so that it could hold more
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| concentrated solution? | A mixture that has a lot of solute dissolved in it
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| Define solubility | how much solute can dissolve in a solvent at a given temperature; no more solute can be dissolved at that temperature
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| What kind of solution holds all the solute it can hold at a certain temperature? | saturated solution
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| What kind of solution would be able to hold some more solute? | unsaturated solution
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| What kind of solution has more solute dissolved in it than you would expect at a given temperature? | supersaturated solution
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| What are 2 ways you can change the concentration of a solution? | decrease or remove solvent; decrease or increase solute
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| What 3 factors affect the solubility of a substance? | temperature, type of solvent, and pressure
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| List 3 characteristic properties of an acid? | sour taste, corrosive, reacts with carbonates
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| What does corrosive mean? | it reacts with meatls, and forms H2 gas bubbles
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| What forms when acids react with carbonates? | CO2 bubbles are formed
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| What is a compound that changes color when in contact with an acid or a base? | indicator
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| Name 3 properties that are characteristic of a base? | bitter taste, feels slippery, does not react with metals or carbonates
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