Все про задание №8 | Химия ОГЭ | Умскул

0:00:00 – The lesson starts with a warm welcome from the instructor. Shortly after at 0:00:45 she asks how everyone is doing. At 0:03:20 the goal of the lecture is outlined. Moving to 0:05:53, the channel and speaker are introduced. By 0:09:53 details of assignment №8 from the OGE test are presented. At 0:13:07 the classification of oxides — basic, amphoteric, and acidic — is explained. From 0:20:45 onward the chemical properties of basic oxides are discussed: their reactions with acids (0:21:54), with acid oxides (0:24:16), with amphoteric oxides (0:28:41), with water (0:32:56), and their reduction by carbon, carbon monoxide, and hydrogen (0:34:51). At 0:36:18 a practice segment asks students to choose two substances that react with calcium oxide (assignment №1). Between 0:38:08 and 0:49:57 the lecture covers properties of acidic oxides—including reactions with bases, acids, basic oxides, amphoteric oxides, water, and a special reaction with oxygen—and follows with a practice task for silicon dioxide (0:53:39). Then a segment on amphoteric oxides begins at 0:57:03, discussing reactions with acids, acid oxides, bases in solution, bases in melt, and alkali‑metal oxides (1:00:59). A third practice question (1:07:13) involves aluminum oxide. The session is then summarized at 1:11:13, the flash course offer is mentioned (1:13:37), and the lecture concludes with a farewell at 1:24:43.