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We discuss all qualitative reactions involving hydrocarbons, oxygen-containing compounds and nitrogen-containing compounds. We solve test format tasks from our database and the Unified State Exam of previous years. Notes, workbook and test assignments for practice on the page of the course "Organic Chemistry from ZERO": https://stepenin.ru/lesson/607 📄 Schedule of the free course on organic chemistry: https://vk.cc/crsR7Z 📝 Solve assignments and read the theory in our electronic textbook on organic chemistry for the 10th grade: https://stepenin.ru/tasks/ebook-10 📝 All the theory and assignments on organics on the page of the course "Organic Chemistry from ZERO": https://vk.cc/ctyqa1 📝 Tests and chains in the Unified State Exam format on our website: https://stepenin.ru/tasks/organic 💯🧠 We are waiting for everyone at our courses to prepare for the Unified State Exam: 👉 Preparatory course for the Unified State Exam-2025 in chemistry for 11th graders: https://stepenin.ru/go/cfpYZLdy 👉 Preparatory course for the USE-2026 in chemistry for 10th graders: https://stepenin.ru/go/rfKv16tF 👩💻 Many tests to prepare for the USE-2025 in chemistry: 1. Tasks on inorganics (more than 2000): https://stepenin.ru/tasks/common 2. The entire database of tasks (more than 6000): https://stepenin.ru/tasks VIDEO ANALYSIS (theory and practice): 📽️ Organics from ZERO to an advanced level: • Organics from ZERO to an advanced level 📽️ Organic chains: • Organic chains, 10th grade and the USE ... 📽️ All analyses of the USE-2024 options in the playlist: • USE 2024 options in chemistry 📽️ Tasks 34: • Task 34 from the USE in chemistry 📚 Workbook on organic chemistry: https://stepenin.ru/tasks/organic-boo... 📚 Book "Thematic tests" (500 pages): https://stepenin.ru/store/book/tests-... 📚 Book "40 options for the USE-2025" (350 pages): https://stepenin.ru/store/book/sbornik30 ================================= Subscribe to our social networks: 🐈 VK chemistry: https://vk.com/chem4you 🦭 VK biology: https://vk.com/bio4you ✈️ Chemical cart: https://t.me/chem4you_ege ✈️ Biological cart: https://t.me/bio4you Our biology channel: / @biocourse =============================== 00:00 Introduction 02:12 Lesson plan 02:37 List of reagents for identification 04:00 What does it mean to “distinguish substances from each other”? An experiment with an answer to a question. 09:11 Transitions of permanganate and dichromate in different environments 12:00 Indicators and how to remember their colors 13:51 Features of alkanes 15:13 Unsaturated hydrocarbons. Decolorization of bromine water. 17:18 Unsaturated hydrocarbons. Reactions with KMnO4 in different environments 24:31 Practice. Task #1 28:45 Terminal alkynes (with a terminal triple bond) 31:57 Cycloalkanes 35:36 Features of benzene. Nitration of benzene. 38:02 Homologues of benzene 38:16 Hugs from Andrey Stepenin and Mikhail Mokrushin. Happy birthday to AC! 39:32 Continuing with benzene homologues. Reactions with KMnO4 in different environments 41:39 Phenylalkenes. Decolorization of bromine water. 42:42 Phenylalkenes. Reactions with KMnO4 in different environments 46:14 Practice. Task #2 50:14 Answers to questions from the chat 52:26 Alcohols. Reactions with metals. 53:58 Alcohols. Reaction with copper(II) oxide 56:13 Alcohols. Reactions with KMnO4 in different environments 58:08 Features of polyhydric alcohols. Reaction with Cu(OH)2 59:34 Reaction with Cu(OH)2 of mono- and disaccharides 01:01:01 Answers to questions from the chat 01:02:21 Phenols. Three qualitative reactions 01:04:24 Answers to questions from the chat 01:06:14 Practice. Task #3 01:09:20 The most important information for 10th graders! 01:15:37 Break, answers to questions and change of speaker 01:21:48 Aldehydes. Oxidation reactions and the "silver mirror". 01:29:55 Do not confuse the two types of reactions with the silver ammonia complex 01:31:30 Aldehydes. Decolorization of bromine water 01:32:12 Practice. Task #4 01:37:51 Carboxylic acids. Indicators, reactions with metals and salts. 01:41:53 Comparison of acidic properties 01:46:58 Qualitative reactions with formic acid 01:50:13 Qualitative reactions with unsaturated acids 01:52:15 Oxalic acid oxidation 01:55:36 Practice. Task #5 01:57:09 All qualitative reactions with carbohydrates 02:00:27 Amines. Indicators. 02:03:46 Amines. Reaction with nitrous acid and some salts 02:10:12 Peculiarity of aniline. Reaction with bromine water 02:11:21 Amino acids. Reactions with metals and nitrous acid 02:13:10 Amino acids. Reaction with copper(II) hydroxide 02:15:21 Proteins and peptides. Biuret and xanthoprotein reactions. 02:17:37 Practice. Task #6 02:20:31 Practice. Task #7 02:23:10 Break 02:26:12 Practice. Task #8 (we do it together) 02:41:35 Where can I find a lot of tests for practice? 02:43:33 Answers to questions from the chat #organicchemistry #egechemistry #organics