Железо на ОГЭ по химии: ВСЯ теория и практика | Умскул

👉 Grab my guide "All Inorganic Materials for the OGE in Diagrams" from the pinned Telegram channel: https://t.me/+olhQzDOPKCdhN2Iy I'm Alexandra Lebedeva, preparing for the OGE in chemistry at the Umschool online school. 3,704 of my students have already received an A on the exam. Preparing with me means not only high-quality materials, but also support throughout the entire learning process with incredible faith in each student. 🍓 Prepare for the OGE with Umschool now to ensure you get the best grades. Follow the link to sign up or ask a question: We'll create a personalized learning track for you in 4 subjects so you won't burn out and will help you achieve the scores you dream of! With our teachers, you'll definitely understand and love the subject and learn about all the pitfalls of exams. A little about Umskul: — Every eighth student achieving perfect scores in Russia in 2025 studied at Umskul. — We've trained 4,900+ students achieving perfect scores. — 47,000+ of our students have passed the Unified State Exam with a score of 90+. — 80,000+ excellent students have passed the Basic State Exam. — Over 9 years, we've prepared 600,000+ students for the Unified State Exam and Basic State Exam. 🔔 Subscribe to the channel, like it, and click the bell to stay up to date with new videos! 💙 Watch my videos and live broadcasts on VK Video: https://vk.cc/cDzdo5 00:00 — Differences between iron (II) and iron (III) compounds 00:56 — Characteristics of iron as a chemical element and atomic structure 01:40 — Physical properties of iron as a simple substance 02:31 — Characteristic oxidation states of iron: 0, +2, +3, +6 03:55 — Methods of obtaining iron in industry (reduction from ores) 05:07 — Chemical properties of iron: interaction with non-metals 05:52 — Reaction of iron with oxygen: formation of iron scale (Fe3O4) 07:53 — Interaction with halogens (chlorine, bromine, iodine) 09:47 — Interaction of iron with sulfur and carbon 11:15 — Reactions with water and Non-oxidizing acids (HCl, dilute H2SO4) 13:22 — Comparison of the production of iron (II) chloride and iron (III) chloride 13:46 — Interaction of iron with oxidizing acids and passivation 15:40 — Reaction schemes with concentrated sulfuric and nitric acids 19:03 — Transition from iron (II) hydroxide to iron (III) hydroxide 22:01 — Chemical properties of iron scale (Fe3O4) with acids 24:27 — Oxidation of iron (II) oxide with oxidizing acids to Fe(III) salts 28:09 — Practice: completing OGE-format assignments on the topic "Iron" 32:44 — Analysis of the chain of chemical transformations (task 21) #umskul #oge #chemistry