Chemical Changes Flashcards
How is the reactivity of metals determined?
By how easily they lose electrons, forming positive ions
Do metals higher up the reactivity series lose their electrons more easily than those less reactive?
The higher up the reactivity series, the more easily they lose electrons and more easily they form positive ions
What is the relationship between the reactivity of a metal and the speed of a reaction?
The more reactive a metal, the faster the reaction will go
What happens if you heat up a reaction?
They react more strongly
How can you investigate the reactivity of metals?
Compare reactivity when reacted with acid or water - measure temperature change
Oxidation is ….
Loss (of electrons)
Reduction is ….
Gain (of electrons)
A ___ reactive metal will ____ a less _____ metal
more
displace
reactive
In displacement reactions, is the metal ion always reduced or oxidised?
CLUE: becomes atom
Reduced - gains electrons
In displacement reactions, is the metal atom always reduced or oxidised?
CLUE: becomes ion
Oxidised - loses electrons
