Higher Tier
You must have: Total Marks
Calculator, ruler, Periodic table (enclosed)
Instructions
•• Use black ink or ball-point pen.
Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
•• Calculators may be used.
Any diagrams may NOT be accurately drawn, unless otherwise indicated.
• You must show all your working out with your answer clearly identified at the
end of your solution.
Information
•• The total mark for this paper is 60.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• structure
In questions marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
Advice
• Read each question carefully before you start to answer it.
•• Try to answer every question.
Check your answers if you have time at the end.
Turn over
, Answer ALL questions. Write your answers in the spaces provided.
Some questions must be answered with a cross in a box . If you change your mind about an
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
answer, put a line through the box and then mark your new answer with a cross .
1 A student investigates the reaction between marble chips and
dilute hydrochloric acid.
The student measures the total volume of carbon dioxide gas produced each minute,
for 10 minutes.
(a) Figure 1 shows part of the apparatus used in the experiment.
Complete Figure 1 by drawing and labelling apparatus that could be used to
collect and measure the volume of the carbon dioxide gas.
(2)
conical flask
dilute
hydrochloric acid
marble chips
Figure 1
2
*P74445A0220*
, (b) Figure 2 shows a graph of the results of the experiment.
A tangent has been drawn on the curve at a time of 3.5 minutes.
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volume of 70
carbon dioxide
in cm3 60
50
40
30
20
10
0
0 2 4 6 8 10
time in minutes
Figure 2
(i) State the total volume of carbon dioxide produced in the first 3.5 minutes.
(1)
volume = ..................................................... . . . . . . . . . cm3
(ii) Using the tangent, calculate the rate of reaction at 3.5 minutes in
cm3 per minute.
change in gas volume
rate of reaction =
change in time
(3)
rate = .............................................................. cm3 per minute
3
*P74445A0320* Turn over
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