For Examiner’s Use General Certificate of Secondary Education January 2009 CHEMISTRY CHY3F Unit Chemistry C3 Foundation Tier Thursday 15 January 2009 1.30 pm to 2.15 pm For this paper you must have: a ruler the Data Sheet (enclosed). You may use a calculator. Time allowed: 45 minutes Instructions Use black ink or black ball-point pen. Fill in the boxes at the top of this page. Answer all questions. You must answer the questions in the spaces provided. Answers written in margins or on blank pages will not be marked. Do all rough work in this book. Cross through any work you do not want to be marked. Information The maximum mark for this paper is 45. The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. Advice In all calculations, show clearly how you work out your answer. CHY3F F Surname Other Names Centre Number Candidate Number Candidate Signature (JAN09CHY3F01) G/K40161 6/6/6/6/6/3 For Examiner’s Use Question Mark Question Mark 1 5 2 6 3 4 Total (Column 1) Total (Column 2) TOTAL Examiner’s Initials
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For Examiner’s Use
General Certifi cate of Secondary EducationJanuary 2009
CHEMISTRY CHY3FUnit Chemistry C3
Foundation Tier
Thursday 15 January 2009 1.30 pm to 2.15 pm
For this paper you must have: a ruler the Data Sheet (enclosed).
You may use a calculator.
Time allowed: 45 minutes
Instructions Use black ink or black ball-point pen. Fill in the boxes at the top of this page. Answer all questions. You must answer the questions in the spaces provided. Answers
written in margins or on blank pages will not be marked. Do all rough work in this book. Cross through any work you do not
want to be marked.
Information The maximum mark for this paper is 45. The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation
in your answers.
Advice In all calculations, show clearly how you work out your answer.
CHY3F
F
Surname Other Names
Centre Number Candidate Number
Candidate Signature
(JAN09CHY3F01)G/K40161 6/6/6/6/6/3
For Examiner’s Use
Question Mark Question Mark
1 5
2 6
3
4
Total (Column 1)
Total (Column 2)
TOTAL
Examiner’s Initials
2 Areas outside the box will
not be scanned for marking
(02)G/K40161/Jan09/CHY3F
Answer all questions in the spaces provided.
1 Water is a natural resource.
1 (a) The diagram shows the water cycle.
Cloud
CloudRain
River
Wind Sun
Sea
Use the diagram to help you describe what happens in the water cycle.
Draw a ring around the correct answer to complete the sentence.
The word weak means that the acid
has a low boiling point.
is dilute.
is partially ionised in water.(1 mark)
7
(07)G/K40161/Jan09/CHY3F
Areas outside the box will
not be scanned for marking
2 (e) A student measured the pH of four acids, A, B, C and D.
The acids were the same concentration. The same quantity of magnesium ribbon was added to each of the acids. The volume of gas produced after 5 minutes was recorded.
The results are shown in the table.
Acid pH Volume of gas in cm3
A 2 18
B 5 6
C 1 24
D 4 12
2 (e) (i) State one way in which the student made sure that the experiment was fair.
5 (b) Read the following information and then answer the questions.
Salt – friend or foe?
Sodium chloride (salt) is an essential mineral for our health. It is used to fl avour and preserve foods. Too much sodium in our diet may increase the risk of high blood pressure and heart disease. Heart disease is the biggest cause of death in the United Kingdom. Some people claim that excess sodium is a poison that can cause cancer, while others say that more evidence is needed.
Many processed foods contain salt, so it is easy to exceed the recommended daily upper limit of about 5 g of salt per person. A ‘healthier’ amount should be about 3 g. In the United Kingdom many people consume over 10 g of salt each day.
One way to reduce sodium in our diet is to use Low Sodium Salt. This has two thirds of the sodium chloride replaced by potassium chloride.
A national newspaper asked readers for their views on two options.
Option 1: Ban the use of sodium chloride in foods.
Option 2: Reduce the amount of sodium chloride in all foods to a ‘healthier’ level.