separation + purification Flashcards
1
Q
define element
A
pure substance that cannot be broken down into any other substances
2
Q
define compounds
A
pure substance made from more than one element
3
Q
define mixtures
A
formed when two or more elements or compounds are presented without being chemically bonded together
4
Q
how to assess purity of substances
A
compare substance to certified pure sample
5
Q
filtration
A
used to separate an insoluble solid from a pure liquid or solution
6
Q
crystallisation
A
process which helps to separate a pure solid from a solution in its crystal form
7
Q
simple distillation
A
used to separate liquid from a mixture to keep the liquid part
8
Q
fractional distillation
A
if mixtures contain more than one liquid and they each have different boiling points -> separated using distillation
