Зоопарк Kаа | United States America (US)

Create: 2018-11-13 Update: 2025-07-03 20:37:03

Очередные чудеса и магнит. Какая-то серия магнитная в нашей любимой рубрике «Сеанс чёрной магии и её разоблачение». Ну, давайте разбираться, почему негорелые спички не магнитятся, а сгоревшие очень даже? В чём магия?

Начнём с того, что спички, я имею в виду их головки, имеют достаточно сложный химический состав. Туда входят окислители – бертолетова соль KClO₃ и калиевый хромпик K₂Cr₂O₇, которые отдают кислород при разложении нагреванием. Для снижения температуры разложения бертолетовой соли добавляют катализатор – пиролюзит MnO₂. Выделяющийся кислород окисляет «горючее» – серу. При этом выделяется сернистый газ, придающий горящей спичке такой характерный запах. Чтобы горение не протекало слишком быстро, в состав добавляют молотое стекло и железный сурик Fe₂O₃.

Именно сгорание оксида железа Fe₂O₃ приводит к образованию магнитного оксида Fe₃O₄ и даже свободного железа. Эти вещества обладают магнитными свойствами, в отличии от немагнитного Fe₂O₃, и отлично магнитятся магнитом.
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Очередные чудеса и магнит. Какая-то серия магнитная в нашей любимой рубрике «Сеанс чёрной магии и её разоблачение». Ну

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