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3 4 Chem AOS2 SAC - GENERAL CHEMISTRY
GENERAL CHEMISTRY
Subject
Physical Science
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Students shared 9 documents in this course
Academic year: 2023/2024
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Keysborough College
VCE
SAC COVER SHEET
Student Name: ____________________________________________________
Subject: Chemistry Subject Teacher: ____________________
SAC Title: Unit 3 Area of Study 2 – problem-solving, including calculations, using chemistry
concepts and skills applied to real-world contexts
Date of Completion: ___________ Mark: ___________/
Student Declaration
The attached work is entirely my own, except where duly credited. Any assistance I
received prior to its completion by any party was in strict accordance with the rules
and guidelines as stipulated by the College and the VCAA. I understand that the
submission of part, or all, of someone else’s work without due credit constitutes
plagiarism, as does the use of other students’ notes/work and I accept the
consequences which follow. I do not have any electronic devices (switched off or
otherwise) on my person – any mobile device I may have has been given to the
supervising teacher.
Please be aware: At Unit 3&4 marks are raw scores, subject to external
moderation
Student’s Signature: __________________ Date: ___________
Teacher’s Signature: __________________ Date: ____________
Section 1
Production of sulphuric acid
(25 Marks)
The industrial production of sulphuric acid is an important multi stage process. In this section
you will be asked to analyse the reactions and conditions of each stage in the production
process.
Stage 1: Production of sulphur dioxide.
In the first reaction of this process molten sulphur is burnt in the presence of oxygen to
produce sulphur dioxide according to the below equation.
S( l ) +O 2 ( g ) ⇋ SO 2 ( g ) ∆ H=−296 kJ
1. Explain using Le Chatelier’s principle the effect that heating the reaction mixture
would have on the yield of sulphur dioxide.
(2 marks)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
2. Using the axis below construct a concentration vs time graph for the following
changes to the mixture after equilibrium has been established.
i. Removal of sulphur dioxide
(2 marks)
ii. Reducing the volume of the gas mixture
(2 marks)
5. Identify the conditions that will optimise the rate and yield for the above reaction
(2 marks)
Rate:_____________________________________________________________________
Yield:_____________________________________________________________________
6. In order to maximise the efficiency of this process, outline the conditions the
conversion reaction should operate at
(1 mark)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
Stage 3: Conversion of sulphur trioxide to sulphuric acid
The final stage in this process is the reaction of sulphur trioxide and water to produce
sulphuric acid according to the equation below
SO 3 ( g ) + H 2 O(l )⇋ H 2 S O 4 (l ) ∆ H=−132 kJ
7. In an initial reaction mixture containing 3 of SO 3 and 6 mol of H 2 O was placed in
a 5L reaction vessel at 400°C and was allowed to reach equilibrium. After the mixture
had reached equilibrium, a total of 2 of H 2 SO 4 was produced.
i. Complete the below table to find the amount of each substance present at
equilibrium
(3 marks)
SO 3 H 2 O H 2 SO 4
Initial
Change
Equilibrium
ii. Find the equilibrium constant for the reaction at 400°C
(2 marks)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
Section 2
Production of sodium and chlorine via electrolysis
(15 Marks)
In this section we will be looking at the industrial production of sodium and chlorine gas from
molten sodium chloride.
1. Using the electrochemical series write down the balanced chemical equations for the
following.
(2 marks)
The reaction occurring at the anode:
___________________________________________________________________________
The reaction occurring at the cathode:
___________________________________________________________________________
2. The cell is currently designed to operate at 50A for 8 hours a day.
i. Calculate the amount of sodium this cell would produce in a day
(2 marks)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
ii. What current would the cell need to operate at to produce 1kg of sodium per
day
(2 marks)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
3. The sodium chlorine electrolysis cell uses molten sodium chlorine rather than an
aqueous solution of sodium chloride. Explain using chemical equations why the
solution is not used in this case.
(2 marks)
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
4. Below is a simple diagram of an electrolytic cell. Label this as the sodium chloride
cell including direction of electrons, cathode and its charge, the anode and its charge
and any products that would form at the electrodes.
(4 marks)
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3 4 Chem AOS2 SAC - GENERAL CHEMISTRY
Subject: Physical Science
9 Documents
Students shared 9 documents in this course
Was this document helpful?
Keysborough College
VCE
SAC COVER SHEET
Student Name: ____________________________________________________
Subject: Chemistry Subject Teacher: ____________________
SAC Title: Unit 3 Area of Study 2 – problem-solving, including calculations, using chemistry
concepts and skills applied to real-world contexts
Date of Completion: ___________ Mark: ___________/40
Student Declaration
The attached work is entirely my own, except where duly credited. Any assistance I
received prior to its completion by any party was in strict accordance with the rules
and guidelines as stipulated by the College and the VCAA. I understand that the
submission of part, or all, of someone else’s work without due credit constitutes
plagiarism, as does the use of other students’ notes/work and I accept the
consequences which follow. I do not have any electronic devices (switched off or
otherwise) on my person – any mobile device I may have has been given to the
supervising teacher.
Please be aware: At Unit 3&4 marks are raw scores, subject to external
moderation
Student’s Signature: __________________ Date: ___________
Teacher’s Signature: __________________ Date: ____________
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