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28935 private teachers in Mrby

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28935 private teachers in Mrby

Elias - Paris202 CNY
202 CNYElectrochemistry: 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
Coraline - Hyères253 CNY
253 CNYEnglish and French courses - I lived 6 years in the USA and 6 months in Australia
Trusted teacher: Courses by video or at my home (Hyères) Hello and welcome ! I am Coraline, an English and French teacher with an international background and a 100% English-speaking daily life. Why me ? •⁠ ⁠I am the founder of Coraline's French Corner, a platform dedicated to learning French for English speakers and English for French speakers. •⁠ ⁠I lived and worked in the United States for 6 years, then in Australia for 6 months, which allowed me to master English and get used to all types of accents. •⁠ ⁠These experiences opened me up to many cultures and strengthened my passion for languages. •⁠ ⁠⁠I also speak Spanish, I am learning Italian, and I have understood the essential keys to learning a language effectively I work exclusively in English in several fields: ➜ Media operations for major international events (Australian Open, Olympic Games, Roland-Garros, Rugby World Cup, etc.): interviews in English, management of international athletes, communication in a 100% English-speaking environment ➜ Marketing: writing and presentation of professional reports and content for brands 100% in English ➜ Translation: Translations of French / English documents ➜ And of course, I work in teaching, with private or group lessons, in French as well as in English ◦ English courses for French speakers, of all levels and for all objectives (travel, professional, academic, etc.) ◦ French courses for English speakers What I offer you: •⁠ ⁠Tailor-made courses, adapted to your objectives •⁠ ⁠⁠ A lively method, focused on speaking, fluency and confidence •⁠ ⁠A caring and motivating atmosphere Whether you want to progress to travel, work internationally or gain fluency in speaking, I am here to support you. Let's get started! / Shall we start?
English · Toefl test preparation · French
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