Redox reactions Flashcards
(14 cards)
What is OIL RIG?
Oxidation is the loss of electrons, Reduction is the gain of electrons.
Balance and write the chemical equation (with state symbols) …
Magnesium + oxygen = magnesium oxide
2 Mg (s) + O2 (g) = 2MgO (s)
Balance and write the chemical equation (with state symbols) …
Hydrogen + Copper oxide = copper + water
H2 (g) + CuO (s) = Cu (s) + H2O
What is a redox reaction?
A redox reaction is a reaction where both reduction and oxidation occur
Oxidation is the GAIN of….
Oxygen by a substance
Reduction is the LOSS of….
Oxygen by a substance
How do you know if a metal will react with another metal? (metal displacement reaction)
It will be higher in the reactivity series.
Out of… zinc + copper oxide
magnesium + zinc oxide
magnesium + copper oxide
which will be the most reactive and why?
magnesium + copper oxide, because they are furthest away from each other in the reactivity series.
What is the the rhyme and order to remember the reactivity series?
Please - POTASSIUM - K
Send - SODIUM - Na
Charlies - CALCIUM - Ca
Monkeys - MAGNESIUM - Mg
And - ALUMINIUM - Al
( crazy - CARBON - C )
Zebra’s - ZINC - Zn
In - IRON - Fe
Tight - TIN - Sn
Lead - LEAD - Pb
( hard - HYDROGEN - H )
Cages - COPPER - Cu
Securely - SILVER - Ag
Guarded - GOLD - Au
What is an oxidising agent?
an oxidising agent is a substance which GIVES oxygen
What is an reducing agent?
a reducing agent is a substance which TAKES oxygen
metals usually react by losing electrons….. i.e. what?
oxidation
non-metals usually eat by gaining electrons….. i.e. what?
reduction
What is a spectator ion?
An ions that does not change in the reaction.
