Cairns School of Distance Education
YEAR 12 CHEMISTRY
Semester 2 Term 3 Assessment Task 3
Extended Experimental Investigation
C
H
EM
IS
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Y
NAME:
TEACHER: N. Hermon
UNIT: Consumer chemistry
ASSESSMENT TECHNIQUE: Extended Experimental Investigation
CRITERIA TO BE ASSESSED:
Knowledge and Conceptual Understanding
Investigative Processes
Evaluating and Concluding
DATE DUE: 13/09/19
TIME ALLOWED: 3 Weeks
ASSESSMENT TASK 3 – Extended Experimental Investigation
CONTEXT: This term you have studied organic chemistry. This assessment examines
your ability to apply this knowledge in order to:
design and ca
y out a scientific investigation,
modify preliminary procedures,
collect and analyse experimental data (primary),
analyse researched secondary data comparing and contrasting it with your own data
submit your assignment as a scientific report involving evaluation and justification of
conclusions.
CONDITIONS:
When using the chemistry kit from CSDE ensure that you read the safety
material and complete a risk assessment which should be handed in with
the report
Ca
y out individual titration experiments with adult supervision
Show all formulae, working and final answers in a logbook.
Present relevant information in a scientific report XXXXXXXXXXwords
in length – discussion, conclusion, evaluation and recommendations).
Additional:
Checkpoint 1 = Research , EEI initial Proposal plus Risk Assessment is due Friday Week 6
teacher to review and give approval to commence experimenting.
Checkpoint 2 = Draft report due Friday Week 7 (self-marking checklist given)
Checkpoint 3 = Final report due Friday Week 9.
Monitoring Checkpoints for your task IS COMPULSORY.
SUBMITTING A DRAFT IS COMPULSORY.
You will need to resubmit your risk assessment forms with your final report. Your draft
will be assessed, IF THE FINAL REPORT IS NOT SUBMITTED ON TIME.
TO BE COMPLETE BY SUPERVISOR
Supervisors are requested to make a copy of this completed test prior to posting and to keep
same in their possession.
Supervisor’s Declaration
I declare that the student named above completed this assessment item in accordance with the conditions and
instructions appearing on the test paper and/or the accompanying notes, and that I was present for the duration of
the test.
Name of supervisor:
Supervisor’s signature:
Date:
YEAR 12 CHEMISTRY, 2019
TASK
EXTENDED EXPERIMENTAL INVESTIGATION
Consumer Chemistry
Develop a planned course of action.
Clearly articulate research question and the hypothesis, providing a statement of purpose
for the investigation (aim)
Provide descriptions of the experiment
Show evidence of modification or student design
Provide evidence of primary and secondary data collection and selection
Execute the experiments
Analyse data
Discuss the outcomes of the experiment
Evaluate and justify conclusions
Present relevant information in a scientific report XXXXXXXXXXwords in length – discussion,
conclusion, evaluation and recommendations).
TASK DESCRIPTION
Part A: Conduct preliminary, non-experimental research that covers your chosen topic (based
around titration, acids
ases).
Part B: Based on focus questions that your research prompts you to ask, formulate a hypothesis
that would describe one aspect of your chosen topic that is of interest to you. Be able to justify your
hypothesis using your research in Part A and that sufficient secondary data is available for
comparisons in the discussion of your report. Ensure that it can be completed in the time provided
and that your investigation has enough scope and rigor by submitting your focus questions and
procedures to your teacher.
Part C: Design and ca
y out the investigation with adult supervision, after a preliminary discussion
with your teacher.
Part D: Present your assignment as a scientific report and logbook
SUGGESTED TOPICS
Volumetric analysis is a form of chemical analysis in which the concentration or amount of a
substance A is determined by measuring the volume of a solution B needed to completely
neutralise or react with all of substance A. This is achieved through a process known as titration.
Below are some potential quality control investigations to monitor the organic substances, wine
and vinegar.
You are permitted to choose other topics if you are interested in a particular idea or context but
this MUST be discussed with the teacher first.
A comparison of titration volumetric analysis and electrical conductivity method on measuring
the acid content in commercial vinegar
ands or white wines.
Compare the titratable acidity of a degassed wine that has been boiled (to remove volatile
acetic acid), and an unboiled sample, (not boiled). High volatile acidity VA is undesirable in
wine. A VA of 0.03% -0.06% is produced during fermentation and is considered normal.
NOTE: You should approach this unit of work assuming that you have a question to answer; that is
you will need to submit a report that presents experimental evidence that supporting a specific
conclusion.
The EEI JOURNAL.
Each student is to create an electronic log book / experimental notebook
You will need to keep a journal with a record of your planning, thinking, decisions, data and
calculations.
DEVELOPING A PLANNED COURSE OF ACTION
1. Read the task criteria sheet completely and thoroughly.
2. Conduct li
ary research. Your notes from this li
ary research will form the basis of the
introduction to your EEI report. It will be used to tell a story that generates interest in the
eader for the field of your research and link to the practical investigation to follow.
3. Decide on the title of your experimental investigation.
4. Plan your approach (flow-chart the procedure)
5. Decide what initial trials you will undertake, how many trials etc.
6. Clarify the chemical principles.
7. Locate your equipment
8. Organise the materials/equipment.
9. Read the Material Safety Data Sheets (MSDSs) and identify safety issues and
precautions that will be necessary when using the materials. This must be submitted
efore starting experimental work.
10. Perform the investigation. You should record all observations, measurements, problems,
and changes in approach and/or modifications to your initial plans and procedure in
your journal.
11. Write your report. This involves collating all you have done into a report of your
investigation.
Report Writing Requirements
Title page
Include details such as your name, subject, teacher’s name and title of your EEI
Contents page
Page showing a list of headings and associated page number
Abstract
A paragraph, that if read by itself, summarises the project in the least possible words. It should
include the aim, procedure/principles/techniques involved and a very
ief statement of your
esults and conclusions.
Introduction
Includes the Background Theory
In your introduction you are to include cu
ent research that is relevant to your EEI.
Provide in text references in your review, these will relate to your bibliography.
Background Theory
What theory is the experiment based upon? What theory relates to your experiment? What
aspects of chemistry are incorporated in your experiment? What are the relevant types of
analysis or calculations? Define the chemical terms related to your experiment? (e.g.
titratable acidity, acid dissociation constant)
Include diagrams and pictures where appropriate. Number and title all diagrams and
pictures.
Where possible, relate and link this background theory to your experiment. You may need
to further describe and explain your experiment and what variables you are considering in
your experiment.
Use co
ect chemical terminology
Use a range of resources – texts, books, journals, internet sites.
Use in-text referencing for any information based on references, only your own original
material need not be referenced e.g. (Ref 1) where “1” refers to the number of the
eference in the bibliography; or use proper APA style referencing (Refer separate
Handout). Direct Quotes need to be in quotation marks or italics, and need to be
specifically referenced immediately after the quote. Do not use many direct quotes. You
should be combining several sources and rewording in your own words.
Keep a record of your references to add to your bibliography
Consider in your introduction
Present possible researchable questions which you have devised.
State which open–ended research question you have selected for the investigation, and
provide justification for your choice -Why do the experiment? What are the real-world or
practical applications of this experiment or this area of chemistry?
Is there mention of your experiment or similar experiment elsewhere
You should describe the overall design plan for the experiment
iefly at the end of your
introduction to orientate the reader towards the goal of your experimental design (can
include a sub-heading if you like)
Hypothesis:
This is the statement to be proven or disproved by your investigation. It is not a prediction on what
you are expecting to happen as a result of experimentation, it should be a reason to do the
experiment.
Apparatus:
What materials, equipment did you use? Make sure you include the size, quantity (e.g..
concentration) or amount of material you are using
Include a scaled diagram or series of diagrams with labels.
Include relevant digital photos
Safety:
The completed risk assessment for your EEI is to be included in your appendix. In the report you
must make relevant statements concerning your particular safety issues and measures taken to
avoid risk specific to your experiment.
Procedure:
A description of what you did in the practical tasks. Include sufficient detail so another scientist
could replicate your method, without over-simplifying.
Use past tense impersonal (non-personal). Avoid excessive repetition.
Explain ‘step by step’ what was attempted in point or numbered form.
A fully labelled diagram of the experimental set-up should be included.
What quantitative and qualitative data was collected, give precise details of collection.
Give details of any trials you ca
ied out to establish your final procedure and details of
modifications. (e.g. – use sub-headings such as: Part A procedure, Modifications to Part A,
Part B procedure)
Consider carefully how you have ensured that your experiment is a fair test, this must be
clearly presented in your report.
Include any other relevant diagrams