All Saints Secondary
Standard Grade Chemistry
Topic 9 Homework - Reactions of Acids
(General Level)
1.
The formulae of some gases are shown in the grid.
A
B
CO
D
C
H2
E
02
C12
F
C02
N02
(a) Identify the gas produced in the reaction of magnesium with hydrochloric
acid.
1 mark (KU)
(b) Identify the gas produced when a carbonate reacts with dilute acid.
1 mark (KU)
2.
Lumps of calcium carbonate react with nitric acid. One of the products is a
gas.
nitric acid
lumps of calcium
carbonate
Identify the correct statement(s).
A
The gas produced is hydrogen.
B
The reaction also produces calcium nitrate.
C
No gas will form if the acid used is hydrochloric acid.
D
The same gas will form if the carbonate used is copper carbonate.
E
The gas will be produced at the same rate if powdered calcium
carbonate is used.
1 mark (PS)
Topic 9 Homework – General Level
All Saints Secondary
3.
Standard Grade Chemistry
Metals and their compounds take part in many reactions.
A
Fe 2 O 3 + 3CO
2Fe + 3CO 2
B
2Mg + SiO 2
2MgO + Si
C
CuCO 3
CuO + CO 2
D
2Zn + O 2
2ZnO
(a) Identify the reaction which takes place in the blast furnace.
1 mark (KU)
(b) Identify the reaction which produces a non-metal element .
1 mark (KU)
4.
Pupils in a chemistry class added different chemicals to dilute hydrochloric
acid.
A
B
magnesium
D
C
magnesium hydroxide
E
silver carbonate
silver
F
zinc carbonate
zinc oxide
(a) Identify the chemical which does not react with dilute hydrochloric acid.
1 mark (KU)
(b) Identify the chemical(s) which produced only a salt and water when reacted
with dilute hydrochloric acid.
1 mark (KU)
5.
There are many different magnesium compounds.
A
B
magnesium bromide
D
C
magnesium carbonate
E
magnesium nitrate
magnesium chloride
F
magnesium oxide
magnesium sulphate
(a) Identify the two compounds which are insoluble.
(You may wish to use page 5 of your data booklet to help you.)
1 mark (PS)
(b) Identify the compound(s) which will neutralise an acid.
1 mark (KU)
Topic 9 Homework – General Level
All Saints Secondary
6.
Standard Grade Chemistry
Excess copper carbonate was added to dilute hydrochloric acid in a beaker.
CuC0 3 (s) + 2HCl(aq)
CuCl 2 (aq) + C0 2 (g) + H 2 0(aq)
When the reaction had finished the contents of the beaker we re filtered.
(a)
A
copper carbonate (CuCO 3 )
B
hydrochloric acid (HCl)
C
copper chloride (CuCl 2 )
D
carbon dioxide (CO 2 )
E
water (H 2 O)
Identify the residue.
1 mark (PS)
(b)
Identify the substance(s) which collected in the flask.
1 mark (PS)
Topic 9 Homework – General Level
All Saints Secondary
7.
Standard Grade Chemistry
Laurie carried out an experiment to make copper sulphate crystals.
(a) Name the type of chemical reaction taking place between the copper oxide
and the dilute sulphuric acid.
1 mark (KU)
(b) How is the excess copper oxide removed in step 4?
1 mark (PS)
(c) Why would copper sulphate not be made by adding copper metal to dilute
sulphuric acid?
1 mark (PS)
8.
During the Apollo 13 space flight, the astronauts discovered that the carbon
dioxide level inside the spacecraft was increasing. They used lithium
hydroxide to remove the carbon dioxide. Lithium carbonate and water were
produced.
Write an equation using formulae for the reaction. There is no need to balance the
equation.
2 marks (KU)
Topic 9 Homework – General Level
All Saints Secondary
9.
Standard Grade Chemistry
A chemist used the following apparatus to investigate biogas. Biogas is a mixture of
carbon dioxide and methane.
syringe A
80 cm 3 of biogas was bubbled into the sodium hydroxide solution which
removed the carbon dioxide. The remaining gas was collected in syringe B.
(a) Complete the diagram to show how the biogas was passed into the sodium
hydroxide solution.
2 marks (PS)
(b) She found that the biogas contained 60% carbon dioxide and 40% methane.
What volume of gas was collected in syringe B?
1 mark (PS)
10.
Chalk (calcium carbonate) is used to give a matt (non-shiny) finish to paper. The
more chalk used, the better the matt finish.
The mass of chalk used can be found by placing a weighed sample of paper in
dilute hydrochloric acid. The chalk reacts and the paper can then be dried and
reweighed.
(a) What type of chemical reaction is taking place?
1 mark (KU)
(b) Name the gas given off during the reaction.
1 mark (PS)
(c) A class at Robertson High School investigated different types of paper. Here
are their results.
Initial mass (g)
Final mass (g)
Loss of mass (g)
Paper A
1.0
0.7
0.3
Paper B
1.0
0.9
0.1
Paper C
1.0
0.6
0.4
Paper D
1.0
0.8
0.2
Which sample of paper had the best matt finish?
1 mark (PS)
Topic 9 Homework – General Level
All Saints Secondary
11.
Standard Grade Chemistry
Kirsty eats three meals a day. The graph shows how the pH in her mouth varies
during the day. X, Y and Z are meal times.
Teeth decay when the pH in the mouth falls below 5.5.
(a) What happens to the pH in the mouth after meal times ?
1 mark (PS)
(b) Some of Kirsty's friends eat snacks between meals. Why does this lead to
more tooth decay?
1 mark (PS)
(c) Many toothpastes are alkaline and contain sodium fluoride.
(i) Why are toothpastes alkaline ?
1 mark (PS)
(ii) Write the formula for sodium fluoride.
1 mark (KU)
Topic 9 Homework – General Level
All Saints Secondary
12.
Standard Grade Chemistry
Egg shells and sea shells contain calcium carbonate.
Calcium carbonate reacts with dilute hydrochloric acid to produce carbon
dioxide gas.
(a) State the test for carbon dioxide.
1 mark (KU)
(b) Adam wanted to find out which type of shell contained the most calcium
carbonate.
He set up the experiment shown below.
5 g egg shell and
60 cm 3 hydrochloric
acid (2mol/l)
balance
(i)
State two ways in which Adam would know when the reaction
had finished.
2 marks (PS)
(ii)
Adam repeated the experiment using 5 g sea shell. His results
are shown in the table.
Balance reading
at start/g
Seashell
Eggshell
106.19
106.19
104.22
104.01
Balance reading
at end/g
Which type of shell contained the most calcium carbonate?
1 mark (PS)
Topic 9 Homework – General Level
All Saints Secondary
13.
Standard Grade Chemistry
Anna added an indigestion tablet containing calcium carbonate to some
acid and measured the volume of gas given off. The whole tablet was used
up in the reaction.
(a) How could Anna show that the gas given off was carbon dioxide?
1 mark (KU)
(b) Anna plotted a graph of her results.
How long did it take to produce 80 cm 3 of gas?
1 mark (PS)
(b) Add a dotted line to show the graph you would expect if Anna repeated the
experiment using half of an indigestion tablet.
1 mark (PS)
(c) Explain how Anna could use her experiment to compare two different
indigestion tablets to see which one neutralized acid more quickly.
2 marks (PS)
Topic 9 Homework – General Level