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7 mixing separating
Yr 7 Mixing and Separating
| Question | Answer |
|---|---|
| a solution in which water is the solvent | aqueous solution |
| filters fitted to the exhaust systems of cars that trap harmful chemicals released by cars to reduce the amount of harmful emissions entering the atmosphere. | catalytic converters |
| a separation technique that spins heavier substances to the outside of the centrifuge | centrifugation |
| a separation technique that separates small traces of substances using differences in solubility | chromatography |
| a mixture in which the particles of one substance are spread evenly throughout another | colloid |
| the amount of solute compared with the amount of solvent in a solution | concentration |
| the presence of an unwanted substance in a useful substance | contamination |
| a separation technique that uses evaporation to separate the parts of a solution. The solvent is evaporated and leaves behind the solute | crystallisation |
| a technique of separating by pouring off the liquid part of a suspension, leaving the solid sediment behind | decanting |
| a solution that contains a small amount of solute compared with solvent | dilute solution |
| a solution that contains a large amount of solute compared with solvent | concentrated solution |
| to remove harmful bacteria | disinfect |
| to mix one substance (the solute) completely with another (the solvent) so that it is no longer visible | dissolve |
| a separation technique that uses evaporation to separate substances. One substance is evaporated. The vapour is collected and then condensed back into a liquid. | distillation |
| substance that promotes the formation of an emulsion | emulsifier |
| a colloid with droplets of one liquid spread evenly through another. examples include mayonnaise & homogenised milk. | emulsion |
| to change from a liquid to a gas: for example, from water to steam | evaporate |
| a device that allows some materials to pass through. It blocks particles too large to fit through. | filter |
| the part of a mixture that passes through a filter | filtrate |
| a separation technique that separates objects of different sizes | filtration |
| Processed milk. The butterfat (oil) is broken up into droplets and spreads evenly through the rest of the milk. This milk is an emulsion, so the butterfat does not settle out. | homogenised milk |
| unable to be dissolved | insoluble |
| a combination of substances, each with its own properties | mixture |
| the yellowish, liquid part of blood, which contains water,minerals, food and wastes from cells | plasma |
| living cell fragments found in blood. They are responsible for healing wounds. They do this by clumping. | platelets |
| characteristics or features of an object or substance | properties |
| consisting of a single substance only | pure |
| to remove unwanted substances from a mixture | purify |
| living cells that transport oxygen to all other living cells in the body | red blood cells |
| the substance that does not pass through a filter. A residue is also left behind after evaporation. | residue |
| the material that collects when suspensions are left to stand. Insoluble substances that collect at the bottom of a container are sediments. | sediment |
| the process of dividing a mixture into its parts | separation |
| a mixture of water and substances that flows from laundries, bathrooms, kitchens and toilets | sewage |
| pipes that remove sewage from a property | sewer |
| the system of drains and pipes that take the sewage away from a property | sewerage |
| a device that passes along the surface of a mixture and removes floating substances | skimmer |
| a property of a substance that describes how quickly it dissolves. Substances with different solubilities dissolve at different rates. | solubility |
| able to be dissolved | soluble |
| substance that is dissolved in solvent to form a solution | solute |
| a mixture of a solute dissolved in a solvent. Solutions are clear, but can be coloured. | solution |
| the substance in which a solute dissolves to form a solution | solvent |
| a mixture of a gas or liquid, and an insoluble substance. The insoluble substance settles out when the mixture is left to stand. | suspension |
| a device used to distil water | water still |
| water in a gaseous state | water vapour |
| living cells that fight bacteria and viruses. They are part of the human body’s immune system. | white blood cells |
| emulsion, sol,foam and aerosol | types of colloids |
| a type of colloid where solid is spread evenly through liquid. An example is muddy creek water. | sol |
| a type of colloid where gas is spread evenly through a liquid or a solid. examples are hair mousse and marshmallows. | foam |
| a type of colloid where liquid or solid is mixed evenly through a gas. Examples are fog and smoke. | aerosol |
| plasma, red blood cells, white blood cells and platelets | parts of blood separated by centrifugation |
| why do toilets and sinks have s-bends | The s-bends fill with water, which acts as a filter. Gases cannot pass through the water back into the house, so our homes stay odour free! |
Created by:
cindybb