C1.12a Making copper sulfate Name
Class
Date
You are going to produce copper sulfate crystals by neutralising dilute sulfuric acid with copper oxide. You do not need to remember how to prepare crystals, only the details of the neutralisation reaction.
Apparatus
Health and safety
eye protection
glass beaker
conical flask
spatula
glass stirring rod
filter funnel
filter paper
copper oxide HARMFUL sulfuric acid IRRITANT
tripod
gauze
●
Wear eye protection
Bunsen burner
universal indicator paper
Method A Pour about 20 cm3 of dilute sulfuric acid into the beaker. B Use the spatula to add a little copper oxide to the acid – stir using the glass rod. C Keep repeating step B until the black powder does not disappear after stirring – this means that all the acid has reacted. D Check that the acid is neutralised by testing the solution with universal indicator paper. E Filter the mixture.
Recording your results 1
Describe the appearance of: a
the sulfuric acid
b
the copper oxide
c
the solution at the end of the reaction
Considering your results/conclusions 2
What was left in the filter paper after you filtered the reaction mixture?
3
What is dissolved in the solution that went through the filter paper?
4
Write a word equation to show the reaction you have carried out.
5
Write a balanced equation to show the reaction you have carried out.
© Pearson Education 2010. Edexcel GCSE Science Activity Pack This document may have been altered from the original.
C1.12b Hazard symbols The cards show some hazard symbols and give descriptions of some different substances. 1
Match up the substances to the hazard symbols. Some substances have more than one hazard.
2
Explain how you decided which hazard applied to each substance.
Concentrated hydrochloric acid Can cause permanent damage in contact with eyes or skin Dilute hydrochloric acid Can cause irritation in contact with eyes or skin Ethanol Keep away from naked flames Can be harmful if swallowed Methanol Can be harmful if swallowed Keep away from flames Trichloromethane Inhalation (breathing) can be fatal Harms the environment Ammonia gas Inhalation (breathing) can be fatal Dissolves to give a solution that can cause serious skin burns Harmful to the environment Copper sulfate Harmful if swallowed Dangerous for the environment
Š Pearson Education 2010. Edexcel GCSE Science Activity Pack This document may have been altered from the original.
C1.12c Neutralisation questions Name
1
2
3
4
Class
Date
calcium carbonate
calcium sulfate
copper chloride
copper oxide
magnesium hydroxide
magnesium nitrate
Look at the names of compounds above. Write the names of all the substances that: a
produce carbon dioxide on reaction with an acid
b
are bases
c
are salts
d
are used in indigestion remedies
e
are made when hydrochloric acid is neutralised
f
are made when nitric acid is neutralised
g
are made when sulfuric acid is neutralised?
Write word equations to show what happens when: a
dilute hydrochloric acid reacts with copper oxide
b
dilute nitric acid reacts with magnesium hydroxide
c
dilute sulfuric acid reacts with copper oxide
d
dilute nitric acid reacts with copper carbonate.
Which acid would you use if you wanted to make: a
copper sulfate
b
copper chloride
c
copper nitrate?
Look at the symbols below. A
B
C
D
Which symbol should be on a container: a
of concentrated acid, that will burn your skin
b
of dilute acid, that might make your skin a bit itchy
c
of ethanol, that is dangerous to put near a flame
d
of a substance that will make you very ill if you swallow any of it?
Š Pearson Education 2010. Edexcel GCSE Science Activity Pack This document may have been altered from the original.
C1.12d Neutralisation questions with equations 1
2
3
4
5
Write down the names of these compounds: a
CaCO3
d
Mg(NO3)2
g
CuCl2
b
CaSO4
e
NaOH
h
CuO
c
Mg(OH)2
f
NaNO3
i
Cu(NO3)2
j
CuSO4
Which compound (or compounds) in question 1: a
produces carbon dioxide when it reacts with an acid
b
are bases
c
are salts
d
are used in indigestion remedies
e
are made when hydrochloric acid is neutralised
f
are made when nitric acid is neutralised
g
are made when sulfuric acid is neutralised?
Sketch the hazard symbol that should be shown on containers of a substance that: a
must be kept away from flames
b
must not contact skin, because it causes burns.
Write word and balanced equations to show what happens when: a
hydrochloric acid reacts with copper oxide
b
nitric acid reacts with magnesium hydroxide
c
sulfuric acid reacts with copper oxide
d
nitric acid reacts with calcium carbonate.
Write balanced equations for the reactions you could use to make: a
copper chloride
b
sodium nitrate.
Extra challenge 6
Phosphoric acid is put into many colas and other fizzy drinks to give them a tangy taste. Its formula is H3PO4. It forms sodium phosphate (Na3PO4) and water when it reacts with sodium hydroxide solution. a
Write a balanced equation for this reaction.
b
Phosphoric acid can also be used to remove rust (iron oxide). The iron(III) oxide neutralises the acid to form iron(III) phosphate (FePO4). Write a word equation and a balanced equation to show what happens in this reaction.
Š Pearson Education 2010. Edexcel GCSE Science Activity Pack This document may have been altered from the original.