chemical changes Flashcards
can metals be placed in order by their reactions with water and dilute acid
yes
what happens when a metal reacts with water and dilute acid
hydrogen gas is given off and it pops if you light it
can more reactive metals displace less reactive metals from an aqueous solution
yes
what 2 non metals are included in the reactivity series
hydrogen and carbon
what is oxidation
the loss of electrons
what is reduction
the gain of electrons
is there enough metal in an ore to make it economic to extract
yes, they might need to be concentrated before the metal is extracted and purified
which metal can be found in its native state
gold because its unreactive
can a metal be extracted if its extracted by less reactive metal
a metal cant be extracted using less reactive metals
how is a salt compound formed
when the hydrogen is replaced metal or ammonium ions
how can salts be made
reacting a suitable metal with an acid. it should be above hydrogen in the reactivity series but not too high
name the reactivity series from most reactive to least
potassium sodium calcium magnesium aluminium carbon zinc iron tin lead hydrogen copper silver gold
describe a test to do do get salt
you can get a reaction between a metal and an acid which willi produce the hydrogen and salt. a sample of the salt made can be crystallised out of the solution by evaporating the water
what is a redox reaction
a reaction between a metal and an acid
