3 + 4) Competition For Oxygen and Displacement Reactions Flashcards
What is a reagent
a substance used to create a chemical reaction
Name the reagents in the thermite reaction
Aluminium and iron oxide
Explain the thermite reaction:
REAGENTS: Aluminium and iron oxide
Aluminium and iron oxide don’t react bc Aluminium is very stable
Magnesium is introduced and acts as a fuse
The Mg and the igniter mixture provides energy
This is needs for the reaction to take place
State the word equation for the thermite reaction
Aluminium + iron oxide -> aluminium oxide + iron
This is an example of a displacement reaction.
State the GENERAL word equation for displacement reactions
Less reactive metal compound + more reactive metal -> less reactive metal + more reactive metal compound
Explain the science behind a displacement reaction?
When a more reactive metal takes the place of a less reactive metal in a compound
State whether a displacement reaction will happen with:
Mg and Silver oxide
Fe and calcium oxide
K and lithium oxide
Zn and copper oxide
Yes
No
Yes
Yes
If a substance has (lost/gained) oxygen, it has been (oxidised/reduced)?
Gained
Oxidised
If a substance has (lost/gained) oxygen, it has been (oxidised/reduced)
Lost
Reduced
State which reactant has been either oxidised or reduced after the reaction:
1) Sodium + silver oxide
2) Lithium + aluminium oxide
1) Sodium has been oxidised, silver oxide has been reduced
2) Lithium has been oxidised, aluminium oxide has been reduced
A less reactive metal and a more reactive metal compound will produce?
No reaction - depends whether the metal is less or more reactive than the metal compound! 🐹
Will a reaction happen with:
Copper sulphate and magnesium
Copper sulphate and zinc
Iron sulphate and magnesium
Magnesium Sulphate and copper
Zinc sulphate and magnesium
Yes
Yes
Yes
No
Yes
Could there be a reason why zinc and iron sulphate might not react? (Displacement)
Because they are next to each other in the reactivity series
Because they aren’t very high up in the reactivity series
