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| Question | Answer |
|---|---|
| If you were given water, salt, and sand and mixed them in a jar well, how could you get ALL THREE ingredients separated again? Be specific, separation will take more than one step. | First you need to get the sand out with a filter. Then you evaporate the water from the salt. |
| If you are given a beaker containing 250 mL of a lightly tinted brown liquid and you shine a light through it and no light beam is visible, what kind of mixture would that indicate that you have in the beaker? | Homogeneous mixture, solution |
| If you have 84 grams of ice in a zip-lock bag and you let it melt, explain what kind of change (Physical or Chemical) has occurred and what happens to the mass of the ice as it changes to a liquid? | Physical change. The mass of the ice stays the same. |
| Carbon dioxide is made up of two atoms of oxygen and one atom of carbon. How would you classify it? | a compound |
| If you mix water and hydrogen peroxide together, how could these two liquids be separated? | They could be separated by boiling them. The liquid with the lowest point will boil first and condense. Then the other boils. distillation based on boiling point |
| Give an example of each of the following: a. physical change-- b. physical property-- c. chemical change-- d. chemical property-- | a. ice melting b. tearing paper c. bike rusting d. flammabilty |
| State the Law of Conservation of Mass and give an example of that Law. | States that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change. If a log burns. 2 lbs. if accumulated mass 2 lbs. |
| the breaking of glass | physical change |
| flammability | chemical property |
| freezing water | physical change |
| color of a substance | physical property |
| shape | physical property |
| If a mixture scatters light and does not settle upon standing, it is a_. | colloid mixture |
| fruit salad | heterogeneous |
| smoke and fog | collid mixtures |
| another name for a heterogenous mixture | solution |
| The scattering of light in a colloid is called the __. | tyndall effect |
| A way to separate a mixture using the physical property of boiling point is __. | distillation |
| A substance may be either a(n) __ or a(n) __. | element or compound |
| When a log burns in a fire a chemical change has occurred. That means that a __ substance is formed. | new |
| When two or more elements combine a __ is formed. | compound |
| Can a substance be separated into simpler parts through differences in physical properties? Explain…. | No, because they are chemically combined and not easily separated. |
Created by:
emilymarroquin
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