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Sci Ch 3
Mixtures, solutions and elements!
| Question | Answer |
|---|---|
| How is matter classified according to makeup? | mixtures, solutions, elements, or components |
| Why is it more useful to classify matter according to makeup rather than according to phase? | By makeup is more specific, precise and less confusing than by phase |
| What is matter that consists or 2 or more substances mixed together but not chemically combined called? | A mixture |
| Why is granite considered a mixture? | It is made up of different minerals that are not chemically combined, they keep thier separate identity and visibility in the rock. |
| Black sand, a Big Mac and a nebula far from Earth are all? | mixtures |
| What type of mixture does not appear to be same throughout (such as a taco)? | a heterogeneous mixture=least mixed |
| A snow globe, pebbles or sand in water are examples of what type of mixture? | A liquid-solid mixture |
| Oil and vinegar is an example of what type of mixture? | A liquid-liquid mixture |
| What type of mixture appears to be the same throughout? | a homogeneous mixture-the particles are small and not easily recognizable |
| Milk, stainless steel, whipped cream, toothpaste and suntan lotion are a few examples of? | homogeneous mixtures or COLLOIDS |
| What 2 properties are characteristic of colloids? | 1. They will not separate upon standing (mayonnaise)because the particles are constantly bombarded and don't have a chance to settle out. 2. they often appear cloudy because of the bombardment (fog, milk) |
| Name 6 types of colloids with examples? | Fog (liquid in gas)=clouds, smoke (solid in gas)=smoke, foam (gas in liquid)=whipped cream, emulsion (liquid in liquid)=mayonnaise, sol (solid in liquid)=paint, gel (liquid in solid)=butter |
| A type of homogeneous mixture that is formed when one substance dissolves in another is called a? | solution |
| What are the 2 parts of a solution? | 1. the substance that is dissolved (the solute) and 2. a substance that does the dissolving (the solvent) |
| What solvent can dissolve many substances and what is it called? | water is called the universal solvent |
| Name a gas-gas solution | air |
| Name a gas-liquid solution | soda water, soda |
| Name a gas-solid solution | charcoal gas mask |
| Name a liquid-liquid solution | antifreeze |
| Name a liquid-solid solution | dental filling (mercury in silver) |
| Name a solid-liquid | ocean water (salt in water) |
| Name a solid-solid | gold jewelry (copper in gold) |
| What is a substance that dissolves in water called and name 2 examples? | soluble: salt and sugare |
| What is a substance that do not dissolve in water and give 2 examples? | insoluble: mercury and oil |
| The amount of a solute that can be completely dissolved in a given amount of solvent at a specific temperature is called its? | solubility |
| Metal solutions are examples of solid solutions dissolved in solids and are called? | alloys |
| Name 3 examples of alloys? | gold jewelry, brass, sterling silver, stainless steel, pewter, bronze, solder |
| What are two properties of a solution? | 1. its particles are too small to be seen and can't be easily separated 2. its particles are evenly spread out (lemonade is an example) |
Created by:
wts8