science revision c3.3

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definition of evaporation
evaporation : changed state from liquid to gas when particles leave surface of liquid only any temperature
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definition of filtrate
liquid or solution that collects in container after mixture has passed through the filter paper
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definition of filtration
way of separating pieces of solid that are mixed with a liquid or solution by pouring through filter paper
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definition of evaporation
change of liquid state to gas
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definition of diffusion
random movement of particles generally in liquid or gas from a region of high concentration until equilibrium is reached
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what does pH mean
potential hydrogen
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what is neutralisation
when an acid is added to an alkali to produce a salt and water
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what do hydrochloric acids produce
chlorides
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what do ethnic acids produce
ethanoates
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what does sulpuric acids produce
sulphates
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what do nitric acids produce
nitrates
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butanoic acid makes...
butanoates
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propane acid + sodium hydroxide >
sodium propanate + water
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what does paper chromatography do
paper chromatography separates substances in mixtures . the dye that mixes best with the water and is attracted best to the paper is the one thats travels faster up the paper
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what is the stationary phases in paper chromatography
the chromatography paper
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what is the mobile phase in paper chromatography
the water
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in gas chromatography what is the mobile phase
helium gas (always)
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in gas chromatography what is the stationary phase
polymer column (always)
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what does a peak in a gas chromatogram stand for?
each peak is for each substance the instrument detects
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and independant variable is
some thing that YOUR changing
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a dpendent variable is
what YOU'RE measuring
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a controlled variable
is what always stays the same
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what is biodegradable
a material that breaks down over time
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6 marks questions in tests require 5 points 1- dependent variable 2- repeated thing 3-controlled variables 4-independent variables 5- a range for example doing experiments at 20*c 30*c 40*c and 50*c try for a range of 5
6 marks questions in tests require 5 points 1- dependent variable 2- repeated thing 3-controlled variables 4-independent variables 5- a range for example doing experiments at 20*c 30*c 40*c and 50*c try for a range of 5
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what is the term used to describe anything made from natural or organic material
anything that can be composted e.g. egg shells ,tea bags ,flesh and wood
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what are the advantages and disadvantages of wool carpets
advantages 1- insulater - it TRAPS air 2- biodegradable disadvantages 1- stains easily 2- biodegradable
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advantages and disadvantages of poly (propene) carpets
adavantages 1- hard wearing 2- hard to stain disadvantages 1- made from plastic 2- doesn't biodegrade naturally
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what two types of carpet are biodegradable
wool and sisal
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Other cards in this set

Card 2

Front

definition of filtrate

Back

liquid or solution that collects in container after mixture has passed through the filter paper

Card 3

Front

definition of filtration

Back

Preview of the front of card 3

Card 4

Front

definition of evaporation

Back

Preview of the front of card 4

Card 5

Front

definition of diffusion

Back

Preview of the front of card 5
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