Class notes
Grade 12 Electrochemistry exam prep
- Course
- Physical Sciences
- Institution
- 12th Grade
Grade 12 electrochemistry exam preparation notes and exercises.
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SACE Accredited Provider: Number PR13517PHYSICAL SCIENCES
TEACHER DEVELOPMENT PROGRAMME
MASTERING ELECTROCHEMISTRY
For information on the TEN Development Programme, please contact:
Robert Stephens E-mail: rob@ten-edu.co.za Mobile: 082 568 5054
TSEBO EDUCATION NETWORK
086 1000 TEN . www.ten-edu.co.za
, Contents
1. INTRODUCTION ................................................................................................................. 3
2. PURPOSE AND USE OF THE GUIDE ................................................................................ 4
3. PLANNING .......................................................................................................................... 5
3.1 Concepts and critical skills needed for electrochemistry ...................................................... 5
3.2 Critical skills activities .......................................................................................................... 8
3.3 Prior knowledge ................................................................................................................. 13
4. GALVANIC CELLS ............................................................................................................ 14
4.1 Spontaneous and non-spontaneous reactions ................................................................... 14
4.2 Redox reactions in galvanic cells ....................................................................................... 15
4.3 Consolidation of galvanic cells ........................................................................................... 18
4.4 Examination question on galvanic cells ............................................................................. 20
5. ELECTROLYTIC CELLS ................................................................................................... 22
5.1 Redox reactions in an electrolytic cell ................................................................................ 22
5.2 Decomposition of copper (II)chloride solution .................................................................... 23
5.3 Electroplating ..................................................................................................................... 24
5.4 Refining of metals .............................................................................................................. 25
5.5 Electrolysis of concentrated sodium chloride solution ........................................................ 26
6. EXAMINATION QUESTIONS ............................................................................................ 28
7. INFORMATION SHEETS .................................................................................................. 33
© Tsebo Education Network www.ten-edu.co.za
F PT S 0000 Physical Sciences Mastering Electrochemistry Teacher Guide Page 2 of 36
, 1. INTRODUCTION
Professional development is about life-long learning and growing as an educator. Life-long
learning will keep you motivated and thinking positively, which in turn will help you gain the
confidence to overcome any obstacles you face in the classroom. Previous studies have shown
that when teachers are effective classroom managers, their students achieve at a higher level.
Professional training: Short courses, conferences, and workshops, largely focuses on practice and
skills, and helps teachers to:
• Go Above and Beyond Subject Area Knowledge
o We believe that ‘curriculum’ goes beyond just subject area knowledge to concepts
and approaches to teaching. Teachers should be constantly figuring out new ways
to engage learners – whether that is including the latest developments in their field
or looking for ways to interact across fields to fully explore concepts through the
lens of multiple subject areas.
o While it is important for teachers to be able to teach about the latest advancements
in their subject area, it is even more important for teachers to always learn new
ways to help learners succeed.
• Improve Student Outcomes
o Teaching is a field that evolves as researchers and practitioners find more effective
ways to reach learners.
o We believe that teachers need to be constantly seeking more effective ways to help
learners learn and looking for more creative and engaged ways to assess their
learning. We encourage teachers to find ways to take risks to ensure we are
providing significant, challenging and relevant learning engagements for each and
every student.
• Help Each Other Become Better Teachers
o No one understands the challenges teachers face in the classroom better than other
teachers, which is why collaboration is a crucial part of teacher professional
development. When teachers get the chance to help each and learn from one
another, like in our Professional Learning Communities (PLCs), they are able to
share their experiences and research, evaluate each other's learning engagements
in the classroom, and join forces to provide more creative and innovative
educational experiences.
o When teachers are challenged to share their teaching practice and their learning
journeys with their peers, it forces them to identify what is really working in their
classroom. They must think about whether it’s the learning tasks they give, how
they work with learners or even if a particular book or visual prompt sparked
learners’ interests.
o It provides an opportunity for teachers to reflect.
© Tsebo Education Network www.ten-edu.co.za
F PT S 0000 Physical Sciences Mastering Electrochemistry Teacher Guide Page 3 of 36
, 2. PURPOSE AND USE OF THE GUIDE
Fundamental concepts of electrochemistry such as electrolytes, ions, electrolytic conduction,
oxidation-reduction reactions, and electrochemical cells are introduced in Grade 11 and 12.
However, electrochemistry is reported to be one of the difficult topics to both teachers and
learners.
This workshop aims to enhance teachers’ knowledge and pedagogy on the topic of
electrochemistry.
The following points were considered when this Teachers’ Guide was developed:
• Analysis of current practice regarding the teaching of electrochemistry.
• Misinterpretation of language in scientific contexts.
• Shortage or absence of teaching aids.
• Creating a context in which teachers are enabled to develop their content knowledge and
teaching strategies in electrochemistry.
• Give opportunity for collaborative approach, involving a sharing of knowledge and skills
amongst teachers.
• Provide teachers with an opportunity to reflect as they complete individual and group
activities.
The material in the Guide focuses on the following key areas:
1. Planning
Emphasis is placed on the value of planning for a topic considering the concepts and
critical skills needed to teach the Grade 12 content. The use of a short baseline
assessment when introducing electrochemistry will allow the teacher to identify content
gaps that learners have in the topic. This will inform the activities that must be used to
revise the critical skills needed for the topic.
2. Development of Content Knowledge
Teachers are guided through Grade 10 – 12 contents on electrochemistry. Studies on the
relationship between teachers' content knowledge and their classroom practices show
clearly how teacher content knowledge influences their pedagogical approach. Teachers
who lack specialist content knowledge is reluctant to implement learner centred teaching
strategies in their classrooms. The development of teachers’ content knowledge is a key
focus in this guide.
3. Teaching Strategies
Through various activities teachers are developed to use appropriate strategies and skills
so that learners develop an understanding of chemical concepts. The strategies in the
guide want to encourage teachers not to be heavily reliant on teaching from the textbook
but making use of alternate strategies such as revising prior knowledge designing a
concept map, use of simulations, demonstrations, and experiments linked to
electrochemistry.
© Tsebo Education Network www.ten-edu.co.za
F PT S 0000 Physical Sciences Mastering Electrochemistry Teacher Guide Page 4 of 36
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