Unit 1 Revision: Reaction Rates
Q.1 When green copper carbonate is
added to hydrochloric acid solution a rapid
reaction takes place in which a gas is given
off and a blue solution is formed.
Give two pieces of information which would
prove that a chemical reaction had taken
place.
Answer:- 1) In the reaction a gas is formed.
2) In the reaction there is a colour change – the
green copper carbonate changes to a blue
solution.
Q2. When silvery magnesium ribbon is burned in air the
magnesium combines with oxygen in the air to
form
white magnesium oxide. In the reaction heat and
light energy are given out.
(a) Give two pieces of information that shows that a
chemical reaction has taken place.
(b) What word is used to describe a reaction in which
energy is given out?
(c) Write a word equation for the reaction.
Answers:(a) 1. Colour change (Silver magnesium to white
powder). 2. Energy given out.
(b) Exothermic.
Burning magnesium in air
(c) Magnesium + Oxygen  Magnesium oxide
Q3. Barium chloride and sodium sulphate solutions are both
(a)
(b)
colourless. When the two solutions are mixed a white solid
called barium sulphate is formed.
Give one piece of information which shows that a chemical
reaction had taken place.
Which of the chemicals mentioned is the precipitate?
Answers:(a) Solid being formed in the reaction when the
chemicals
present in the two solutions react together.
(b) The barium sulphate is the precipitate. A
precipitate is
Mixing solutions of barium chloride
and sodium sulphate
an insoluble solid formed when two solutions are
mixed.
Q4.
(a) Identify the two experiments which can be used to
investigate the
effect of concentration on the rate of the reaction.
(b) Identify the experiment with the fastest reaction rate.
Answers
(a) C and D.
(b) F
Q5. Matthew added manganese dioxide to hydrogen peroxide
solution, oxygen was produced. Manganese dioxide is a catalyst.
(a) What is the purpose of a catalyst?
(b) What will be the mass of the manganese dioxide at the end
of the reaction?
(c) What would happen to the rate at which oxygen gas is given off
if the temperature was raised to 35oC?
Answers: (a) A catalyst speeds up a reaction.
(b) 0.1 g (A catalyst is not used up in a reaction).
(c) The rate of oxygen gas production will increase.
Q6 . Zinc reacts with dilute sulphuric acid.
Identify the two factor which will speed up the reaction.
A
B
C
D
E
Using a larger volume of acid
Diluting the acid with water
Using a larger beaker
Heating the acid
Using a catalyst
Answers:- D and E.
Samples of three metals were each heated and
placed in jars of oxygen.
The correct order of reactivityof the metals,
putting the most reactive first is
A
1, 3, 2
B
1, 2, 3
C
2, 3, 1
D
2, 1, 3
Unit 1 Revision: Chemical structures
Q.1
Answer:-
Unit 1 Revision: Chemical structures
1. Which of the following
metals would be a solid at
1000o C?
( You may wish to use page
5 of the data booklet to
help you)
Answer:-
A
B
C
D
aluminium
calcium
iron
magnesium
Unit 1 Revision: Chemical structures
Q.1
Answer:-
Unit 1 Revision: Chemical structures
Q.1
Answer:-
Unit 1 Revision: Chemical structures
Q.1
Answer:-
Unit 1 Revision: Chemical structures
Q.1
Answer:-
Unit 1 Revision: Acids and Bases
Q.1
Answer:-
Unit 1 Revision: Acids and Bases
1. Which of the following is formed when dilute
hydrochloric acid is added to potassium
hydroxide solution
A water
B oxygen
C hydrogen
D carbon dioxide
Answer:-
Unit 1 Revision: Acids and Bases
Q. A student used pH paper and a colour chart to
find the pH of some household substances.
The results table is shown below.
(a)Give the entry for the pH of water.
1
(b)How was the colour chart used to give a pH
Answer:value?
1
Unit 1 Revision: Acids and Bases
1. The graph shows that the level of carbon dioxide in
the atmosphere is falling.
The government has set targets to reduce carbon
dioxide levels.
(a)Why is it important to reduce carbon dioxide
levels in the atmosphere?
1
(b)In
what year will the government reach its
Answer:target?
1ps
Unit 1 Revision: Acids and Bases
1. The table shows the pH
values of some common
solutions.
(a)Name the two acids.
1ps
(b)Name the solution which is
neutral
1ps
Answer:-
_______________
a) When John achieved a neutral solution, what
Unit
1 Revision: Acids and Bases
pH be?
__________________________________
_______________
a) Name the salt formed in this reaction.
__________________________________
_______________
a) Suggest an alternative way to measure the pH
than using a pH meter.
Answer:-