Waseley Hills High School
BTEC Level 1/2 First Award in Principles of Applied Science
Unit 2: Chemistry and Our Earth
Name:
Start Date:
Interim deadline:
Deadline Date:
Related Unit content:
Learning aim A: Investigate
chemical reactivity and bonding (Part 2)
Bonding and structure:
a. formulae of molecules
b. covalent bonding (hydrogen, chlorine, carbon dioxide, methane,
water, oxygen)
c. ionic bonding (sodium chloride, magnesium oxide, magnesium chloride)
d. properties of simple covalent, giant covalent and ionic materials.
Assignment A Chemical Bonding & Structure
Scenario
You work for a chemical company as a quality control laboratory technician. It is important to
understand how chemical substances are bonded together, in order for you to carry out laboratory tests
on products as they are produced and determine what uses they could have.
As part of an induction day for new recruits, you will need to present material showing how substances
are formed through ionic or covalent bonding, and how their properties are related to their bonding and
structure.
Task 1: Why things don’t fall apart
On the induction day, a simple experiment will be used as a teamwork and ‘icebreaking’ exercise. You need to try the experiment first to get a standard set of
results to be used when checking the experiments conducted by people on the
induction day.
1. a) Carry out the practical experiment ‘Investigating the properties of
substances’.
b) Write up the practical by recording the results appropriately in the
observations table, make relevant conclusions and comparisons between the
different properties of the substances tested and answer the questions on the
worksheet (2.A P2)
2. a) In order to prepare the new recruits for their work, you need to produce a
written report called ‘Bonding, structure and applications of chemical
substances’. Include in your report detailed notes and fully labelled diagrams
about the following:
(i) the chemical formulae and ‘dot-and-cross’ diagrams of ammonia, carbon
dioxide, chlorine, hydrogen, magnesium chloride, magnesium oxide, methane,
nitrogen, oxygen, sodium chloride, sodium oxide, water. (2.A P3)
(ii) an account of how the following chemical substances are formed from their
atoms, mentioning the type of chemical bonds formed in each case:
sodium chloride, hydrogen, oxygen, nitrogen, magnesium chloride, methane,
water. (2.A M3)
RESOURCES
(iii) how the observed properties of the substances investigated in the
practical (see part 1a) can be explained in terms of the type of chemical bonding
and the chemical structure present. (2.A M2)
(iv) the applications and uses of sodium chloride and silicon dioxide, stating
how their applications link to their properties and how the type of chemical
bonding and their chemical structure are also related to their properties.(2.A D2)
(v) a concluding statement about the properties of ionic and covalent
substances. (2.A M2) and their applications (2.A D2)
The grading criteria that this assignment relates to:
P2
Compare properties of ionic and covalent substances
P3
Draw dot-and-cross diagrams of simple ionic and covalent substances
M2
Explain the properties of ionic and covalent substances
M3
Describe the formation of ionic and covalent substances
D2
Relate applications of compounds to their properties and to their bonding and structure
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.
Criterion
To achieve the criteria you must show that you are able to:
Unit
reference
Describe properties of ionic and covalent substances
2
1A.2
Classify substances as ionic or covalent
2
1A.3
Evidence you must produce for this task;
Level
2A.P2
2A.P3
2A.M3
Part 2A.M2
Part 2A.M2
Part 2A.D2
Part
2A.D2
Description
Table 4- Practical and observation sheet
Questions on worksheet task 2a questions
Dot and cross diagram for Ammonia
Dot and cross diagram for Carbon dioxide
Dot and cross diagram for Chlorine
Dot and cross diagram for Hydrogen
Dot and cross diagram for Magnesium chloride
Dot and cross diagram for Magnesium oxide
Dot and cross diagram for Methane
Dot and cross diagram for Nitrogen
Dot and cross diagram for Oxygen
Dot and cross diagram for Sodium chloride
Dot and cross diagram for Sodium oxide
Dot and cross diagram for Water
Report on how Sodium chloride is formed and the type of bonding it contains.
Report on how Hydrogen is formed and the type of bonding it contains.
Report on how Oxygen is formed and the type of bonding it contains.
Report on how Nitrogen is formed and the type of bonding it contains.
Report on how Magnesium chloride is formed and the type of bonding it contains.
Report on how Methane is formed and the type of bonding it contains.
Report on how Water is formed and the type of bonding it contains.
Report explaining the properties of ionic substances
Report explaining the properties of simple covalent substances
Report explaining the properties of giant covalent substances
Concluding statement on the properties of ionic and covalent substances
Table 5- completed
Description of the uses of sodium chloride related to its properties
Description of the uses of silicon dioxide related to its properties
Checklist
Learner Assessment Submission and Declaration
This sheet must be completed by the learner and provided for work
submitted for assessment.
Learner name:
Date issued:
Assessor name:
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 A (part
2)
Task
ref.
Evidence submitted
Page numbers or
description
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.
Learner signature: ________________________________Date:_______________
Summary assessor’s feedback
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Internal verifier’s comment
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