Electrochemistry: This class introduces students to the principles of electrochemistry, focusing on redox reactions and galvanic cell.

From 39 C$ /h

Lesson: Electrochemistry
Duration: 60 minutes
Grade Level: Advanced Science / Chemistry (IGCSE, A Level, IB)
Main Objectives:
By the end of this lesson, students should be able to:
1. Define electrochemistry and explain its importance.
2. Describe the difference between electrolytic and galvanic (voltaic) cells.
3. Write half-reactions and overall cell reactions.
4. Calculate standard electrode potentials and predict the direction of electron flow.
5. Understand practical applications of electrochemistry in everyday life.

Lesson Outline / Brief Notes:

1. Introduction to Electrochemistry (10 minutes)
Definition: Electrochemistry is the branch of chemistry that deals with the relationship between chemical reactions and electricity.
Key Concept: Redox reactions involve the transfer of electrons.
Real-life example: Batteries, electroplating, corrosion prevention.
2. Galvanic (Voltaic) Cells (15 minutes)
Composed of two half-cells connected by a salt bridge.
Oxidation occurs at the anode, reduction at the cathode.
Example: Daniell cell
Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s)
Oxidation: Zn → Zn2+ + 2e−
Reduction: Cu2+ + 2e− → Cu
3. Electrolytic Cells (10 minutes)
Require an external power source to drive non-spontaneous reactions.
Example: Electrolysis of molten NaCl
At cathode: Na+ + e− → Na
At anode: 2Cl− → Cl2 + 2e-
4. Standard Electrode Potentials (10 minutes)
Electrode potential measures the tendency of a species to be reduced.
Example:
Zn2+/Zn: -0.76 V
Cu2+/Cu: +0.34 V
Predict electron flow: Electrons flow from Zn to Cu in a Daniell cell.
5. Applications of Electrochemistry (5 minutes)
Batteries (Li-ion, lead-acid)
Electroplating (silver plating, chromium plating)
Corrosion protection (galvanization)
Exercise (10 minutes)
1. Short Answer Questions:
a. Define electrochemistry.
b. Identify the anode and cathode in a zinc-copper galvanic cell.
c. Explain the difference between galvanic and electrolytic cells.
2. Calculation:
Given:
Zn2+/Zn: -0.76 V
Cu2+/Cu: +0.34 V
Calculate the standard cell potential of a Daniell cell.
3. Application Question:
Describe one practical application of electrochemistry in everyday life and explain how it works.

Extra information

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Location

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At student's location :

Around Amsterdam, Netherlands

At teacher's location :

Notre Dame Cadeaux / Retronome Paris, Paris, France

Online from Zambia

About Me

Experienced Science Educator with nearly a decade of teaching Biology and Chemistry across A Level, AS Level, O Level, IGCSE, Edexcel, and IB curricula, complemented by proficiency in Physics and Mathematics. Passionate about problem-solving, scientific inquiry, and continuous learning through documentaries and research, I am dedicated to delivering high-quality education that inspires curiosity, fosters critical thinking, and drives academic excellence in students.

Education

Bachelor’s Degree in Science Education – Kwame Nkrumah University, 2022 Certificate of Completion in Science Teaching Capital- Cambridge university press Science Practical in Blended Education – Cambridge university press

Experience / Qualifications

I am an experienced educator with four years of teaching Chemistry, Biology, Physics, and Mathematics across multiple curricula, including A Level, IGCSE, Edexcel, and IB. I also lead a team of trained teachers specializing in Commercial subjects, Computer Science, and ICT, fostering a collaborative and multidisciplinary approach to learning. Committed to high-quality education, I focus on developing critical thinking, problem-solving skills, and academic excellence in all students.

Age

Teenagers (13-17 years old)

Adults (18-64 years old)

Seniors (65+ years old)

Student level

Beginner

Intermediate

Advanced

Duration

60 minutes

The class is taught in

English

Skills

Chemistry

Availability of a typical week

(GMT -05:00)

New York

At teacher's location and via webcam

At student's home

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00-04

04-08

08-12

12-16

16-20

20-24

IGCSE, Edexcel, Checkpoint, IB, Combined sciences Biology, Chemistry, Mathematics,

49 C$ /h

These courses provide students with a broad and engaging foundation in Science, covering Biology, Chemistry, and Physics. In Biology, learners investigate the structures, functions, and interactions of living organisms and their environments. Chemistry lessons focus on the composition, properties, and reactions of substances, helping students understand the building blocks of matter and the changes it undergoes. Physics explores the fundamental principles of energy, motion, and forces that shape the physical world. Through a balance of theory, practical experiments, and problem-solving activities, students develop critical thinking, analytical skills, and a deeper appreciation of how science explains and influences everyday life.

Enthalpy Changes in Chemical Reactions; This lesson explores how chemical reactions involve energy changes that can be exo or endothermic.

39 C$ /h

Lesson Plan: Enthalpy Changes in Chemical Reactions
Grade/Level: Secondary / IGCSE / AS level
Duration: 60 minutes
Topic: Enthalpy Changes in Reactions
Lesson Objectives
By the end of the lesson, students should be able to:
1. Understand that chemical reactions are accompanied by enthalpy changes, which can be exothermic or endothermic.
2. Construct and interpret reaction pathway diagrams, showing enthalpy change and activation energy.
3. Define and use key terms: standard conditions (⦵), enthalpy change of reaction (ΔHr⦵), formation (ΔHf⦵), combustion (ΔHc⦵), and neutralisation (ΔHneut⦵).
Lesson Breakdown (60 minutes)
1. Introduction (5 minutes)
Begin with a real-life hook:
Ask: “Why does burning wood release heat, but dissolving ammonium nitrate in water feels cold?”
Link to lesson: These are examples of exothermic and endothermic reactions.
2. Theory: Enthalpy Changes (10 minutes)
Define enthalpy (H): The heat content of a system at constant pressure.
Define enthalpy change (ΔH): Heat energy transferred during a reaction at constant pressure.
Distinguish:
Exothermic reaction: ΔH is negative (heat released).
Endothermic reaction: ΔH is positive (heat absorbed).
Give simple examples:
Exothermic → combustion of methane.
Endothermic → thermal decomposition of calcium carbonate.
3. Reaction Pathway Diagrams (15 minutes)
Draw and explain two diagrams:
Exothermic pathway: Products lower in energy than reactants, ΔH negative.
Endothermic pathway: Products higher in energy than reactants, ΔH positive.
Introduce activation energy (Ea):Minimum energy needed for reaction to occur.
Label diagrams clearly:
Reactants → peak (activation energy) → products.
Highlight ΔH and Ea.
4. Standard Conditions and Key Enthalpy Terms (15 minutes)
Explain standard conditions (⦵):

298 K (25°C), 101 kPa pressure, substances in standard states.
Define and discuss:
Standard enthalpy change of reaction (ΔHr⦵): Heat change when reaction occurs in molar quantities under standard conditions.
Standard enthalpy of formation (ΔHf⦵): Heat change when 1 mole of compound is formed from its elements in their standard states.
Standard enthalpy of combustion (ΔHc⦵):Heat change when 1 mole of substance is completely burnt in oxygen under standard conditions.
Standard enthalpy of neutralisation (ΔHneut⦵): Heat change when an acid and alkali react to form 1 mole of water under standard conditions.
Use simple examples for each (e.g., combustion of methane, formation of H2O, neutralisation of HCl with NaOH).

5. Guided Practice / Mini Activity (10 minutes)
Students sketch their own reaction pathway diagrams (exothermic and endothermic).
Label ΔH and Ea.
Pair discussion: “Why do we still need activation energy even for exothermic reactions?”

6. Exercise (Homework / Classwork) (5 minutes)
Answer the following questions:
1. State whether each reaction is exothermic or endothermic:
a) Burning propane gas in oxygen.
b) Photosynthesis in plants.
c) Dissolving anhydrous copper(II) sulfate in water.

2. On a reaction pathway diagram:

Show ΔH and Ea for an endothermic reaction.

3. Define the following terms and give one example each:
a) Standard enthalpy of formation (ΔHf⦵)
b) Standard enthalpy of combustion (ΔHc⦵)
c) Standard enthalpy of neutralisation (ΔHneut⦵)

4. Under standard conditions, the enthalpy of combustion of methane is –890 kJ mol−1.

Abderrahim

5.0

(1)

Hello,
Previously a double degree student in computer science and mathematics at Sorbonne Paris Nord University (formerly Paris 13).
Student in applied mathematics engineering at ENSTA PARIS and ENSAE PARIS in double degree
I can give tutoring in mathematics so that in physics and chemistry, the main advantage of my classes is that they contain tips that improve the student's response to an exercise, a very good course that aims the essential without forgetting the important details, and a follow-up of the evolution of the student through the tests of progression and exercises since the exercises of application until the starry exercises.
Apart from my good teaching approach, I have great skills in mathematics and physics chemistry besides I am the first dz my class in mathematics in double license.
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Cordially.

Mounir

5.0

(1)

I am a qualified engineer from Arts et Métiers ParisTech and followed a preparatory class, accumulating more than 10 years of experience as a private mathematics teacher. My goal is to help your child reach their full academic potential in mathematics and develop skills that will prepare them for a bright future.

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Details of the formula:

One to two sessions of 1h30/2h per week to assimilate the course and prepare for the evaluations.
Classes delivered via Google Meet for effective online learning.
Use of a virtual whiteboard to facilitate the assimilation of concepts.
Access to an online library including 10 mathematics reference books.
Over 1000 online exercises to strengthen math skills.
Questions ?

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Izhar

5.0

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Facing problem in Chemistry? Does your teacher presume that you know every single basic concept and start teaching directly advanced concepts!!
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Here is a brief overview of the topics we'll be covering :

* Some basic Concepts of Chemistry
* Structure of Atom
* Classification of Elements and Periodicity in Properties
* Chemical Bonding and Molecular Structure
* States of Matter: Solid, liquid & gas
* Thermodynamics
* Equilibrium
* Redox Reactions
* Hydrogen
* s-block Elements (Alkali and Alkaline earth metals)
* p-block Elements
* d-block Elements
* f-block Elements
* Organic Chemistry: some basic principles and techniques
* Hydrocarbons
* Environmental Chemistry
* Solid State
* Solutions
* Electrochemistry
* Chemical Kinetics
* Surface Chemistry
* General Principles and Processes of Isolation Elements
* Coordination Compounds
* Haloalkanes and Haloarenes
* Alcohols, Phenols and Ethers
* Aldehydes, Ketones and Carboxylic Acids
* Organic Compounds containing Nitrogen
* Biomolecules
* Polymers
* Chemistry in Everyday Life

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Give yourself a chance for a better future.
All the best

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English is filled with nuances and I can help decode this anywhere from basic English to improving vocabulary and conversational skills with a Native Londoner.
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I teach mathematics, physics and chemistry from elementary to high school: I put much more emphasis on methodology and confidence building. This makes it easier for students to approach the material.

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Yassine

5.0

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Weekly lessons, Preparation for exams (patent, national, entrance exam ...), Holiday courses and adaptation according to current programs.

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in: maths, physics chemistry PC, SI engineering sciences, mechanics (RDM ...).

LEVELS:

Moroccan Bac: Sc Maths, PC, SVT, International and National Bac.

The Mission: Seconde, Première, Terminale S.

Higher: (Fac, ENSA, ENCG, Preparatory Classes ..).

Engineer by training with an experience of 7 years in support (including one in France), I offer the student all the necessary elements so that he becomes as autonomous as possible while giving him a little perspective on the future and the different paths he can take to try to fuel his motivation.

Amin

5.0

(1)

Struggling with math, physics, or chemistry? You're not alone — these subjects are hard, and classroom explanations are rarely enough.
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Topics covered:

Mathematics: algebra, geometry, calculus, trigonometry, probability
Physics: mechanics, electricity, optics, thermodynamics
Chemistry: organic, inorganic, stoichiometry, reactions

My approach:
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I completed CPGE (Classes Préparatoires aux Grandes Écoles) in Mathematics and Physics before graduating as a State Engineer — I know these subjects at an advanced level and I know where students typically get lost.
Individual and small group sessions available. Online (worldwide) in French, Arabic, or English.

Kassem

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Looking to help your son or daughter pass their patent exam? My preparation course is here to help you! Together, we will work through the exam history to ensure that your child is ready for all the tests. We will also discuss tips for passing the exam and saving time in math, physics and chemistry. My goal is to provide your child with the tools to pass their patent exam with confidence. Do not hesitate to contact me for more information or to reserve your place in the course.
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5.0

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I am an engineer who recently graduated from the École Nationale Polytechnique and CentraleSupélec. I obtained 19.5/20 in mathematics and physics in my baccalaureate, and 20/20 in chemistry. I once helped a middle school student who had poor grades in mathematics, such as 02/20. Thanks to my help, she was able to improve and obtain excellent grades, such as 20/20 and 18/20. My motivation, passion, and techniques, developed through my experience in these subjects, make it easy for me to convey information to any student, regardless of their level.

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📚 Edexcel IGCSE Chemistry (4CH1): Organic Chemistry – Topic Overview

Level: IGCSE (Edexcel – Code: 4CH1)
Subject: Chemistry
Topic:Organic Chemistry
Format: Online
Tutor: Experienced Science & Biology Educator

🔍 Topic Overview:
Explore the fascinating branch of Organic Chemistry, where we study carbon compounds that form the basis of fuels, plastics, medicines, and living organisms. This topic introduces you to the fundamental ideas and reactions of alkanes, alkenes, alcohols, acids, and polymers.

🧪 What You'll Learn:
✅ What makes a compound organic
✅ Properties and reactions of alkanes (saturated hydrocarbons)
✅ How to identify alkenes using bromine water (unsaturated hydrocarbons)
✅ The structure and reactions of alcohols and carboxylic acids
✅ The formation and significance of addition polymers (e.g. poly(ethene))
✅ Environmental challenges with non-biodegradable plastics
✅ Systematic naming of organic compounds using IUPAC rules

🎯 Ideal For:

* Edexcel IGCSE Chemistry students (Code: 4CH1)
* Learners aiming to master organic reactions and chemical structures
* Students preparing for exams with topic-based revision
* Curious minds exploring how chemistry connects to real life

💡 Learning Outcomes:
✔️ Understand and apply organic chemistry terminology
✔️ Predict the products of key reactions (combustion, addition, substitution)
✔️ Draw and interpret structural and molecular formulas
✔️ Explain how polymers are made and discuss their uses and impacts

📍Book a session today and turn Organic Chemistry into one of your strongest IGCSE topics — taught with diagrams, past paper questions, and simplified concepts!

Bérénice

5.0

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My name is Bérénice, I am 22 years old, and I offer private lessons in Mathematics, Physics and Chemistry in Paris.
Currently a student in Fundamental Physics at the Orsay Master's program in Fundamental Physics (Master 2 specializing in Microfluidics, jointly accredited with ESPCI), I wish to support students by sharing solid methods, knowledge, and study habits. I previously completed two years of preparatory classes (PTSI/PT*) after graduating from high school with honors in science.
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Dr.

5.0

(1)

Hello, I'm Pratibha, a PhD-qualified Biology and Chemistry tutor based in the Netherlands.

I have more than 10 years of teaching experience at secondary and university level. I help students understand Biology, Biochemistry, Biotechnology, Pharmacology and Chemistry, so they can do well in exams and feel confident in the subject. I teach online, and students from the Netherlands, Europe and the rest of the world are welcome.

What I teach
Secondary and pre-university: Biology and Chemistry for IB, A-Level, IGCSE, AP and other international curricula
University: Biochemistry, Molecular Biology, Immunology, Genetics, Microbiology, Zoology and Biotechnology, all the five branches of Chemistry
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PhD in Zoology, MSc in Biotechnology (Core subject- Chemistry) and MSc in Zoology (Gold Medalist)
Former Assistant Professor, with experience teaching both school and university students
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Fluent in English, with working knowledge of French and native-level Hindi

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University students who need help with Biochemistry, Molecular Biology or Immunology
Students who need help with revision, past papers or coursework

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Yasmine, a Mathematics & Physics-Chemistry teacher, graduated from École CENTRALE NANTES (class of 2015).

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Yasmine

Ziad

5.0

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I offer personalized academic support in Mathematics, Physics, Chemistry, and Biology for secondary and high-school students. Whether the goal is to strengthen fundamental concepts, overcome specific difficulties, improve problem-solving skills, prepare for tests and exams, or simply gain confidence in a subject, each lesson is adapted to the student’s curriculum, level, objectives, and learning pace.

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¤ Mathematics — algebra, equations and inequalities, functions, sequences, geometry, trigonometry, vectors, limits, derivatives, integrals, probability and statistics
¤ Physics — mechanics, motion and forces, energy, electricity, electromagnetism, waves, optics, thermodynamics, atomic and modern physics
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Hrird

5.0

(1)

Hello dear middle school students, high school students and parents,

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