Mini Test - reactivity of metals, uses, rusting Flashcards
How do most metals react with acids
acid + metal -> metal salt + hydrogen
How can you measure the reactivity of metals with acid
use different metals with dilute acid
more reactive = faster reaction
What does the type of salt produced depend on
the type of acid used
What is the method for testing reactivity of metals with acid
- set up 3 boiling tubes & fill with equal volumes of dilute HCl or H2SO
- place pieces of magnesium, zinc & iron in different test tubes (same size and shape)
- speed is determined by number of bubbles given off
How do metals react with water
metal + water -> metal hydroxide + hydrogen
what metals react vigorously with water
- potassium
- sodium
- calcium
- lithium
What increases with the reactivity of the metal
the amount of energy given out by the reaction
(K gives enough to ignite H2)
How will less reactive metals react with water
(LR) metal + steam -> metal oxide + hydrogen
what metals are less reactive with water
- magnesium
- zinc
- iron
How do you show a reaction with steam in an experiment
- get a boiling tube and put a mineral wool piece soaked in water and the metal piece in it
- heat it so steam is let off
will copper react with water or steam
no
What is the reactivity series
it lists the metals in order of their reactivity
How do I remeber the reactivity series
Please Send Lions, Cats, Monkeys And Cute Zebras Into Hot Countries Signed Gordon
how does the reactivity series go
- potassium
- sodium
- lithium
- calcium
- magnesium
- aluminium
- carbon
- zinc
- iron
- hydrogen
- copper
- silver
- gold
how do displacement reactions occur
a more reactive metal displaces a less reactive metal out of its compound
What is the word for a reaction where oxidising occurs
redox reaction
How can you tell a displacement reaction has occured
there wil be a colour change - the solution will become the colour of the less reactive metal
when is the word ‘rust’ used
when iron corrodes
