4 - Chemical changes

Question 1

list some elements in the reactivity series

Answer 1

Most
K
Na
Li
Ca
Mg
C
zn
Fe
H
Cu
Au

Question 2

what do you from when a metal reacts with oxygen

Answer 2

metal oxide

Question 3

gaining oxygen

Answer 3

oxidation reaction

Question 4

what does the reactivity of a metal depend on

Answer 4

its ability to lose electrons and forma positive ion

Question 5

where are unnreactive metals (I.e. gold) found

Answer 5

n the earth as the metal itself

Question 6

how does extraction with carbon work

Answer 6

elements lower than carbon on the reactivity series can simply be extracted from a compound by a displacement reaction

Question 7

bases are usually,,,?

Answer 7

metal oxides or hydroxides

Question 8

what can bases do

Answer 8

neutralise acids producing a salt and water

Question 9

what ions do acids + alkalis always produce

Answer 9

acid = H+

Alkali = OH- (hydroxide)

Question 10

neutralisation reaction

Answer 10

acid + base -> salt + water

Question 11

Acids reaction with metal carbonate

Answer 11

acid + carbonate -> salt, water, CO2