Worksheets4.4 Chemical change
Total questions: 20
Worksheet time: 10mins
solid state symbol
s
g
l
aq
gas state symbol
g
l
aq
s
A dissolved salt state symbol
aq
s
l
g
23g of chemical A reacts with 10g of chemical B to make chemical C. Chemical C is the
product
reactant
23g of chemical A reacts with 10g of chemical B to make chemical C. Chemical A and B are
reactants
products
23g of chemical A reacts with 10g of chemical B to make chemical C. The mass of chemical C will be
33g
3g
13g
10g of calcium carbonate is added to 100g of acid. The combined mass after the reaction is 105g. The 5g drop i mass is due to
gas being given off
an exothermic reaction
a endothermic reaction
calcium carbonate will thermally decompose when heated- to give off carbon dioxide gas. The other product is
Calcium oxide
calcium
magnesium
oxygen
copper oxide + carbon produces copper and carbon dioxide, this is a
displacement reaction
neutralisation reaction
swapping reaction
trading places reaction
Aluminium ore is
Aluminium oxide
pure aluminium
aluminium mixed with magnesium
A displacement reaction will happen if aluminium oxide is heated with Carbon
false
true
Aluminium oxide and carbon do not react because
aluminium is more reactive than carbon
carbon is more reactive than aluminium
they can't be bothered
Aluminium oxide is refined by electrolysis
true
false
Aluminium ions have a positive charge, this is true of all metal ions
true
false
Aluminium ions will migrate to the
negative electrode
postive electrode
What will you observe at the negative electrode
aluminium metal coating the electrode
oxygen bubble being given off
nothing
to which electrode will the oxygen migrate to
positive electrode
negative electrode
2 Oxygen ions will lose 2 electrons each at the negative electrode, and
become an oxygen element
become a oxygen ion
The carbon electrode is hot, and reacts with the oxygen made to form
carbon dioxide
carbon monoxide
nitrogen
hydrogen
Not a required practical in this unit
density
making soluble salts
electrolysis
titrations
