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Test Review Altered
Mixtures review
| Question | Answer |
|---|---|
| Concentration | The amount of solute dissolved in the solvent - measured in grams per litre g/L |
| Concentrated | Lots of solute dissolved in the solvent. |
| Dilute | Relatively little solute dissolved in the solvent. |
| Dilute foods | maple sap, nectar, watered down kool-aid |
| Concentrated foods | maple syrup, honey, frozen orange juice |
| Unsaturated solution | more solute can dissolve because there are free solvent particles |
| Saturated | no more solute will dissolve at the same temperature because all of the solvent particles are full |
| Hydrometer | Measures the concentration of solutions. |
| How does a hydrometer work | It floats higher in concentrated solutions and lower in dilute solutions. |
| Is the Dead Sea concentrated or dilute | So concentrated that you can't sink. |
| What four things can affect the rate of dissolving | Stirring, Crushing, Temperature and Pressure |
| 4 grams of sugar dissolved in 100ml of water has what concentration in g/L | 40g/L |
| Will a hydrometer float high or low in a dilute solution | low |
| Pure Substances | They have only one kind of particle in them. |
| What are 5 ways to separate mixtures | 1. evaporation 2. distillation 3. chromatography 4. Filtration 5. Fractional distillation |
| In evaporation, what do we get back from the mixture – the solute or solvent | Solute |
| Solute | The part of a solution that gets dissolved |
| Solvent | The part of the solution that does the dissolving |
| In distillation, what do we get back from the mixture – the solute or solvent | Solvent |
| Distillation – how would you distill water and purify it | Boil and evaporate the water, capture the steam and cool it so it condenses back into a liquid. |
| What is the filtrate | The substance that passes through a filter |
| What is the residue | The substance that does not pass through the filter. |
| How do they separate oil into it’s pure parts | Fractional Distillation |
| What are four parts that can be separated from oil | Gasoline, kerosene, diesel, furnace oil, jet fuel, wax, tar, ashphalt |
| What is a petrochemical | Any chemical made from oil – there are over 500,000 |
| An example of a petrochemical | Plastic, polyester, rubber |
| What does WHMIS stand for | Workplace Hazardous Materials Information System |
| What is WHMIS used for | To protect us from dangerous materials |
Created by:
devon science