CHEMISTRY - Chemical Analysis

Chemical Analysis
1 of 27
Pure Substance
a substance made up of just one element or compound
2 of 27
Testing for Water
it turns white anyhydrous copper sulfate blue (but this test only shows that water is present)
3 of 27
Testing for Pure Water
melting point is exactly 0'C and the boiling point is exactly 100'C
4 of 27
Identifying Pure Substances
melting points and boiling points can be used to identify pure substances because they have specific temperatures at which they melt and boil (its fixed points) - because impurities lower the MP and raise the BP
5 of 27
Fixed Point - Definition
the exact point at which a pure substance melts or boils
6 of 27
a mixture that has been designed to produce a useful product (such as paints and alloys)
7 of 27
Analysing Chromatograms
8 of 27
Mobile Phase
the solvent - with a stronger attraction to the mobile phase, a substance will move further in a set time
9 of 27
Stationary Phase
the paper
10 of 27
Testing for Gasses
11 of 27
Hydrogen Gas
a lighted splint burns rapidly with a squeaky pop
12 of 27
Oxygen Gas
a glowing splint relights
13 of 27
Carbon Dioxide Gas
turns limewater cloudy
14 of 27
bleaches damp blue litmus paper white
15 of 27
Tests for Positive Ions
16 of 27
Lithium (Li+)
burns crimson
17 of 27
Sodium (Na+)
burns yellow
18 of 27
Potassium (K+)
burns lilac
19 of 27
Calcium (Ca2+)
burns orange-red
20 of 27
Copper (Cu2+)
burns green
21 of 27
Testing for Hydroxides
add sodium hydroxide, and a precipitate of the metal hydroxide will form - aluminium,
22 of 27
Testing with Sodium Hydroxide
copper (II) ions form a blue precipitate of copper (II) hydroxide // iron (II) ions form a green precipitate of iron (II) hydroxide // iron (III) ions form a brown precipitate of iron (III) hydroxide
23 of 27
Testing for Negative Ions
24 of 27
Testing for Carbonate Ions
add dilute hydrochloric acid to the substance and see if it fizzes - the gas produced should be carbon dioxide which woud turn limewater cloudy
25 of 27
Testing for Halide Ions
add dilute nitric acid and silevr nitrate solution - chlorine ions give a white precipitate // bromine ions give a cream precipitate // iodide ions give a yello precipitate
26 of 27
Testing for Sulphate Ions
add dilute hydrochloric acid and barium chloride solution - if a white precipitate form then sulphate ions are present
27 of 27

Other cards in this set

Card 2


Pure Substance


a substance made up of just one element or compound

Card 3


Testing for Water


Preview of the front of card 3

Card 4


Testing for Pure Water


Preview of the front of card 4

Card 5


Identifying Pure Substances


Preview of the front of card 5
View more cards


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Analysing substances resources »