separation + purification

Question 1

define element

Answer 1

pure substance that cannot be broken down into any other substances

Question 2

define compounds

Answer 2

pure substance made from more than one element

Question 3

define mixtures

Answer 3

formed when two or more elements or compounds are presented without being chemically bonded together

Question 4

how to assess purity of substances

Answer 4

compare substance to certified pure sample

Question 5

filtration

Answer 5

used to separate an insoluble solid from a pure liquid or solution

Question 6

crystallisation

Answer 6

process which helps to separate a pure solid from a solution in its crystal form

Question 7

simple distillation

Answer 7

used to separate liquid from a mixture to keep the liquid part

Question 8

fractional distillation

Answer 8

if mixtures contain more than one liquid and they each have different boiling points -> separated using distillation