L3 Filtration and Evaporation PDF

Decanting, Sieving, Filtration and Evaporation The orange mix! The orange mix A student was given a mixture of yellow chalk and red jelly crystals. The student has made jelly at home and knows that the jelly crystals dissolve in water.  Discuss a method that will separate the orange mix...

Decanting, Sieving, Filtration and Evaporation The orange mix! The orange mix A student was given a mixture of yellow chalk and red jelly crystals. The student has made jelly at home and knows that the jelly crystals dissolve in water.  Discuss a method that will separate the orange mix (red jelly crystals and yellow chalk) using the following key words: mixture solvent soluble dissolve solution insoluble sediment particles suspension filter large filtrate residue Different filters Water filters  Coffee filters Pour the water over the ground coffee in the filter  Brewing tea  Air conditioners and many vacuum cleaners use HEPA filters to remove dust and pollen from the air. Aquariums use filters to clean the water Face masks can be used to filter out smoke particles from bush fires Fire fighters need gas masks A gas mask uses a filter Carbon based filters for filtering substances out of tap water Examples of filters - notes Water filters to purify tap water before drinking Coffee filters and tea bags keep the larger particles separate from the water but the smaller particles can pass through Filters in air conditioning units to remove dust and pollen from the air Aquarium filters to clean the water for the fish Gas masks used in fire fighters breathing apparatus to remove smoke particles Saltwater Saltwater is a solution, a mixture of salt that has been dissolved in water. How can I get the salt back? Evaporation I can use heat to evaporate the water. The water particles will evaporate into the air leaving me with solid salt.  How to set up a Bunsen burner, what equipment do I need and in what order do I do things?  The Bunsen burner is placed on a heatproof mat and the rubber tubing is connected to the gas tap The air hole is closed at the start to ensure less oxygen is burnt with the gas which makes a yellow visible safety flame. A flame from a lighter is held over the barrel before the gas tap is turned on. The air hole is opened when a blue flame for heating is required  For evaporation you will also need a tripod, gauze mat and evaporating dish  Evaporation can be used as a separating technique If salt is dissolved in water then the water can be heated to speed up its evaporation. The water changes state from liquid to gas. When the water vapour boils and goes up into the air it leaves behind the salt  Do I need a Bunsen Burner?  No, over time in a warm room the water would naturally evaporate and the salt would be left behind Salt farming Australian salt farming Australian salt farming in 1920 The first large-scale operation to produce salt by solar evaporation of sea water was founded by Richard Cheetham in 1888 in Geelong, Victoria, Australia. https://australianfoodtimeline.com.au/salt-making-australia/  https://www.youtube.com/watch?v=0vVyw2rVA4Q Ever Wonder How Sea Salt Is Made? Find Out Here | National Geographic  What other everyday scenarios can you think of where evaporation occurs? Examples of evaporation Hanging out wet washing to dry- water leaves the clothes by evaporation Coming out of the swimming pool and queuing for an ice-cream in the sun- your skin will dry off as the water on it evaporates After mopping a floor, you do not dry it, you just leave it to dry by evaporation Sweating is a method your body uses to cool you down, your skin secretes sweat, and the heat from your body is used to evaporate it, this leaves you feeling cooler Puddles ‘disappearing’