Reactions and Reactivity of metals

Question 1

what does MASH stand for

Answer 1

Metal + Acid = Salt + Hydrogen

Question 2

Give the Reactivity series involving 12 Elements

Answer 2

Potassium 
Sodium
Calcium
Magnesium
Aluminium 
Carbon
Zinc
Iron
Hydrogen
Copper
Silver
Gold

Question 3

Give another way of describing reactivity

Answer 3

the more easily a metal loses its outer electrons and forms a positive ion, the more reactive it will be

Question 4

Describe a certain test to find metal reactivity then give reason to result

Answer 4

Experiment: placing metals into dilute hydrochloric acid
Due to Mg, Al, Zn and Iron being higher than hydrogen on the reactivity series they react with the acid in a competition reaction for the chlorine
The more reactive the metal is, the faster the reaction with the acid will be - more reactive metals like magnesium will fizz vigorously, whereas copper doesn’t bubble. - giving off bubbles of hrdogen

Question 5

Are metals at the top of the reactivity series more or less resistant to oxidation

Answer 5

less

Question 6

describe the 2 experiments with water and metals
what are the products? (word equation)
and what these suggest

Answer 6

Firstly, Metal + water = metal HYDROXIDE(OH) + hydrogen
K, Na, Li and Ca react vigorously with water
Secondly, a less reactive metal + steam = metal OXIDE + hydrogen
Mg, Zn and Fe won’t react with water but will react with steam.
Copper won’t react with any of this shit

Question 7

Under what conditions does iron rust?

Answer 7

In the presence of water and oxygen

Question 8

name some methods to prevent iron rusting?

Answer 8

Barrier method - painting it - keeping it away from oxygen and water
Galvanising - Coasting the iron in a thin layer of zinc - another barrier
Sacrificial method - Zn, Mg and Al blocks of metals more reactive than Fe are less resistant to oxidation and more reactive and therefore react more with the oxygen/water than the iron