Making salts

Question 1

Acid + metal oxide ->

Answer 1

salt + water

Question 2

Acid + metal carbonate ->

Answer 2

salt + water + carbon dioxide

Question 3

Method of making salts

Answer 3

gently warm a fixed volume of acid to increase rate of reaction, add more than needed base (metal oxide OR metal carbonate) to the acid to neutralise the acid or
to ensure all the acid has fully reacted, filter unreacted base to remove any unreacted base, gently warm the (salt) solution to evaporate some water to concentrate the solution, allow to cool in a crystallising dish so
crystals form solution becomes too concentrated so the salt is
forced out of solution to become solid (crystals), remove crystals and pat dry to obtain pure crystals

Question 4

In making salts practical why shouldn’t you boil the sulfuric acid

Answer 4

as it can spit at you which is harmful

Question 5

In making salts practical why do we warm the acid

Answer 5

to increase rate of reaction

Question 6

In making salts practical what does excess mean

Answer 6

more than enough reactant to compeletly react with the acid

Question 7

In making salts practical why should you only add 1/4 spatula of copper oxide at a time

Answer 7

otherwise it could boil over

Question 8

Reactions between acid and bases name

Answer 8

neutralisation

Question 9

Solution collected after filtration name

Answer 9

filtrate