Lab Report Separating Mixtures

YEAR 7 SCIENCE

Term 1 2016

Extended Experimental Investigation

‘Separating Mixtures’

REPORT BOOKLET

Name:Harriet Slym

Teacher:Mrs Laffranchi

INTRODUCTION:

In term one we learned about the separation of mixtures and in this assignment we are reporting on the separation techniques used to separate gravel, salt and iron. A mixture can be defined as many individual components combined together as one. A pure substance though is a material made up of only one particle like a Diamond, water, pure sugar, and gold.

The 3 methods used to separate mixtures in this instance are magnetism, filtration and evaporation. Magnetism is using a magnet of some sort to extract the iron from the solution as the iron is attracted to the magnet

Flow chart

I am going to use magnetism to separate iron from a solution. Magnetism is using a magnet of some sort to extract the iron from the solution as the iron is attracted to the magnet and the solution is repelled from the magnet.

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I am going to use filtration to separate gravel from a solution. Filtration is where you use a filter with holes big enough to keep the solids in but small enough to let the solution out.

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I am going to use evaporation to separate salt from a solution. Evaporation is separating mixtures by using heat. you put the mixture of a solid and a liquid on top of a heated source and the liquid will evaporate and the solid will be left in the evaporating

To improve this experiment we could have spent more time trying to get the iron out, or we could have got some metal tweezers or something small like that to remove the gravel off the magnet if it gets sticks so that we don't accidentally remove the iron off the magnet as well while using our fingers. That would then give us a full recovery. 6% or iron was lost

Salt In this experiment we lost 1.8g of salt because as we where pouring the water in with the salt the salt got spilt and we lost some of it. To improve this experiment we could be more careful of our surroundings so then it wouldn't have spilt and we would have got a full recovery. 18% of salt was lost

Gravel

In this experiment we lost 1.4g of gravel because the experiment was running well but we might have poured too much of he mixture into the filtration paper and it ripped and some of the mixture spilt on the bench and we where unable to recover it. If we didn't pour to much of the mixture in at once the filtration paper would not have ripped and we wouldn't have lost any of the mixture that way we would have got a full recovery. 14% of gravel was