C4 - Chemical Changes Flashcards
(26 cards)
Give the reactivity series.
Potassium
Sodium
Calcium
Magnesium
Aluminium
Carbon
Zinc
Iron
Tin
Lead
Hydrogen
Copper
Silver
Gold
Platinum
Give the two odd elements on the reactivity series
carbon and hydrogen
When metals react with water what does it create?
metal hydroxide and hydrogen
When metals react with acid what does it create?
salt and hydrogen
what does OILRIG mean?
Oxidation
Is
Loss
Reduction
Is
Gain
What is described as how vigorously
something reacts?
Reactivity
In terms of oxygen, what is
oxidation?
Addition of oxygen
In terms of oxygen, what is
reduction?
Removal of oxygen
What can be used to measure the
pH of a solution?
Universal indicator/pH
probe/phenolphthalein
What is described as a substance
with a pH lower than 7?
Acid
What is described as a substance
with a pH higher than 7?
Alkali
What substances form H+
ions when
dissolved in water?
Acid
What substances form OHions
when dissolved in water?
Alkali
What is described as the process of
using electricity to extract elements
from a compound?
Electrolysis
What is the name of the positive
electrode?
Anode
What is the name of the negative
electrode?
Cathode
What is defined as a liquid or solution
that contains ions so can conduce
electricity?
Electrolyte
Where are metals formed in
electrolysis?
Cathode/negative electrode
Where are non-metals formed in
electrolysis?
Anode/positive electrode
What type of ionic substance cannot
be electrolysed because the ions are
not able to move?
Solid
In the electrolysis of aluminium oxide,
why is the aluminium oxide mixed with cryolite?
Cryolite dissolves aluminium oxide to
allow electrolysis to happen (melting
point too high for cost effectiveness)
In electrolysis of solutions, when is a
metal not produced at the negative
electrode?
Metal is less reactive than hydrogen.
Why are some metals not able to be
electrolysed using carbon electrodes?
If the metal is less reactive than
carbon.
When an acid reacts with a metal,
what is oxidised?
Metal
