Waseley Hills High School
BTEC Level 1/2 First Award in Principles of Applied Science
Unit 2: Chemistry and Our Earth
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Start Date:
Interim deadline: Deadline Date:
Related Unit content:
Learning aim C: Investigate the factors involved in the rate of chemical reactions
Assignment C Controlling industrial reactions
Scenario
As one of the production chemists working at the local chemical plant, you have been asked to explain to the chemical plant operatives the factors that affect rate, yield and atom economy of reactions. A visit to a chemical company that manufactures products or a visit from a research chemist or plant chemist would help put this topic into context.
Task 1: How fast is your reaction? / RESOURCES
When your company makes a new batch of useful chemical products, it needs to know which reaction conditions are best so that it doesn’t waste energy, water, time, money and other resources. To find out which reaction conditions are the best, you need to first research which factors affect a chemical reaction.
a) Carry out the four practical experiments called ‘How fast is your reaction?’ – make sure you read and understand the ‘Safety’ note for each one before you begin. Write up the four experiments recording the results appropriately in the observations table, making relevant conclusions about the different properties of substances and answering the questions, including balancing equations. (2.C P6 P7)
b) Produce a written report called ‘Making ammonia’. Use an appropriate text book and/or websites to research this topic and include in your report detailed notes and fully labelled diagrams on:
·  how ammonia is made in the Haber process – include the equation in words and symbols, and whether it is reversible or irreversible (2.C M5 partly)
·  explain the terms ‘yield’ and ‘atom economy’ in relation to the Haber process (2.C M6)
·  how changes in pressure, concentration, temperature and amount of catalyst affect the rate and yield of the ammonia produced (2.C M5) include a percentage yield graph of ammonia production (2.C D4)
·  consider whether or not these changes in concentration, temperature and amount of catalyst would have the same effect on other industrial reactions (2.C D4)
·  the values of temperature and pressure that give certain yields (2.C M5) as well as the actual values used in industry to achieve the best yield (2.C M6)
·  use the % yield graph of ammonia production to work out the best temperature and pressure to give the highest yield in theory (2.C D4)
·  explain why, in theory, the values of temperature and pressure that you worked out should produce the highest yield (2.C D4)
·  analyse the difference between the two different sets of conditions, and explain why the actual reaction conditions are different from the theoretical values. How do chemists overcome the problem of low yield in industry? (2.C D4)
The grading criteria that this assignment relates to:
P6 / Describe the factors that can affect the rates of chemical reactions
P7 / Identify the number and types of atoms in balanced chemical equations
M5 / Explain how different factors affect the rate of industrial reactions
M6 / Explain the terms ‘yield’ and ‘atom economy’ in relation to specific chemical reactions
D4 / Analyse how different factors affect the rate and yield of an industrial reaction
If you have not achieved the Level 2 criteria, your work will be assessed to determine if the following Level 1 criteria have been met.
To achieve the criteria you must show that you are able to: / Unit / Criterion reference
Identify the factors that can affect the rates of chemical reactions / 2 / 1C.6
Identify reactants and products, including state symbols in chemical equations, and whether reactions are reversible or irreversible / 2 / 1C.7

Evidence you must produce for this task;

Level / Description / Checklist
2C.P6
2C.P7
Part
2C.M6 / Experiment part 1 completed- all questions answered and observation sheet completed
Experiment part 2 completed- all questions answered and observation sheet completed
Experiment part 3 completed- all questions answered and observation sheet completed
Experiment part 4 completed- all questions answered and observation sheet completed
Part 2C.M6 / Explanation of the terms ‘yield’ and ‘atom economy’ in relation to the Haber process
2C.M5 / A description of how changes in pressure, concentration, temperature and amount of catalyst affect the rate and yield of the ammonia produced
A percentage yield graph of ammonia production
A description explaining whether or not these changes in concentration, temperature and amount of catalyst would have the same effect on other industrial reactions
2C.D4 / A table showing the values of temperature and pressure that give certain yields, as well as the actual values used in industry to achieve the best yield
A description of the best temperature and pressure to give the highest yield in theory for the Haber process
Explanation as to why, in theory, the values of temperature and pressure that you worked out should produce the highest yield
An analysis of the difference between the two different sets of conditions, and an explanation as to why the actual reaction conditions are different from the theoretical value

Learner Assessment Submission and Declaration

This sheet must be completed by the learner and provided for work submitted for assessment.

Learner name: / Assessor name:
Date issued: / Completion date: / Submitted on:
Qualification: BTEC Level 1/2 First Award in Principles of Applied Science
Assessment reference and title: Unit 2: Chemistry and Our Earth, Assignment C
Task ref. / Evidence submitted / Page numbers or description
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Internal verifier’s comment
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Learner declaration
I certify that the work submitted for this assignment is my own. I have clearly referenced any sources used in the work. I understand that false declaration is a form of malpractice.
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