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49326 private teachers in Rns

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49326 private teachers in Rns

Elias - Paris24€
24€Electrochemistry: This class introduces students to the principles of electrochemistry, focusing on redox reactions and galvanic cell.
Trusted teacher: 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.
Chemistry
Emna - Sfax15€
15€English Classes for All Levels – From Primary to Bac!
Trusted teacher: (Version française ci-dessous) After obtaining my Master’s degree in English, I gained valuable teaching experience abroad in France and Turkey, and I currently teach at an American school. Passionate about languages and education, I love sharing my knowledge and helping students progress with confidence. Why choose me? 🔹Master’s degree in English with international teaching experience 🔹Worked with learners of all ages and adapted to different learning styles 🔹Personalized approach to boost confidence and guarantee progress What I offer: 🔹 Tailor-made English lessons for Primary, College, Brevet, and Bac 🔹 Exam preparation (Brevet, Bac, TOEFL, IELTS) with strategies and practice 🔹 Focus on grammar, writing, speaking, and listening to build real-life skills My goal? To help you improve your results, gain fluency, and succeed brilliantly in English! Titulaire d’un Master en anglais, j’ai enseigné à l’étranger en France et en Turquie, et je travaille actuellement dans une école américaine. Passionnée par l’enseignement, j’aime transmettre mes connaissances et accompagner mes élèves vers la réussite. Pourquoi me choisir ? 🔹 Master en anglais et solide expérience internationale 🔹 Pédagogie adaptée à chaque élève, quel que soit son niveau 🔹 Approche personnalisée pour progresser rapidement et avec confiance Ce que je propose : 🔹 Cours sur mesure pour le Primaire, Collège, Brevet et Bac 🔹 Préparation aux examens (Brevet, Bac, TOEFL, IELTS) avec méthodologie claire 🔹 Travail sur la grammaire, l’expression écrite et orale, ainsi que la compréhension Mon objectif ? Vous aider à progresser efficacement, améliorer vos résultats et parler anglais avec assurance !
English
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