File:49. Топовски удар.ogg
Original file (Ogg multiplexed audio/video file, Theora/Vorbis, length 47 s, 1,920 × 1,080 pixels, 9.91 Mbps overall, file size: 55.58 MB)
Summary
| Description |
English: Cannon’s fire
- 30 mL of 20 % hydrogen peroxide and 20 mL of ethanol are added to the evaporating dish and the mixture is ignited with a safety lighter. At the beginning, a light blue, almost invisible, flame is noticed due to the burning of ethanol. After the addition of potassium permanganate (about 0.5 g), the reaction is immediately accelerated, and a higher flame and pops or bangs are observed. Permanganate ions react with hydrogen peroxide to release oxygen. 2MnO4–(aq) + 3H2O2(aq)→ 2MnO2(s) + 2H2O(l) + 3O2(g) + 2OH–(aq) Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.Македонски: Топовски удар
- Во сатчето се додава 30 mL 20 % водород пероксид и 20 mL етанол и смесата се пали со безбедносна запалка. На почетокот се забележува светло син, речиси невидлив, пламен кој се должи на горењето на етанолот. По додавање на калиум перманганатот (околу 0,5 g), реакцијата веднаш се забрзува, а се забележува повисок пламен и потпукнувања. Перманганатните јони реагираат со водород пероксидот и ослободуваат кислород. 2MnO4–(aq) + 3H2O2(aq)→ 2MnO2(s) + 2H2O(l) + 3O2(g) + 2OH–(aq) Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје. |
| Date | |
| Source | Own work |
| Author | Deni Ingilizovski |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:07, 3 September 2021 | 47 s, 1,920 × 1,080 (55.58 MB) | Dandarmkd | Uploaded own work with UploadWizard |
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