Flashcards
Separation techniques
Flashcards do conjunto (20)
- 1What is a mixture and give an example?A mixture is made up of 2 or more substances that are not chemically joined.
e.g.oil and water - 2A pure substance has a ............. and .............. melting pointclear and sharp
- 3What is solution and give an example?A solution is a substance that can dissolve in a solvent.
e.g. Sugar dissolves in water - 4Saturated solution means?A saturated solution means no more solute can be dissolved.
- 5Solubility can vary at different temperatures. What is the temperature for the solubility for sugar if there was 100gms of it?the temperature would be 50 degrees
- 6What happens when the solute particles are dissolved?The solvent particles surround the solute particles
- 7Insoluble means?The substance cannot be dissolved in the solvent.
- 8What is filtration?Filtration is when you separate a liquid from an insoluble solid.
- 9Another way to separate a liquid from a solid is..............To evaporate the liquid so you get left with the solid.
- 10What can you use to collect a pure substance?You can use distillation.
- 11What does chromatography allow you to do?It allows you to separate substances in a mixture if they are all soluble in the same solvent.
- 12Acids are ............... and .................. so to be safe you should wear ........... and a ............. .corrosive and harful
goggles and a labcoat - 13State concentration?The measure of how many particles there is in 1 litre of water
- 14How can you dilute a solution?By adding water
- 15What can a pH scale do?it can tell us how acidic or alkaline a substance is.
- 16What is the universal indicator of and colour and acid neutral alkaliacid= red = pH1
neutral= green = pH7
alkaline= blue = pH14 - 17Mixing an acid with alkali with give you ...a neutral solution - this is a neutralisation reaction
- 18acid and alkali equationacid+base=salt=water
acid+alkali=salt+water
acid+carbonate=salt+water+carbon dioxide
acid + metal= salt+hydrogen - 19Sodium hydroxide + hydroxide acid=sodium chloride+water
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- FlashCards sobre Separation techniques, criado por mahat034 em 03-10-2015.
- Criado por
- mahat034 · out 2015
- Atualizado
- 19 fev 2016
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