File:45. Мермер на жар.ogg
Original file (Ogg multiplexed audio/video file, Theora/Vorbis, length 51 s, 1,920 × 1,080 pixels, 7.96 Mbps overall, file size: 48.03 MB)
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Summary[edit]
| Description |
English: Grilled marble
- A small piece of marble is heated to red hot on a Bunsen burner. When added to water containing few drops of phenolphthalein indicator, the liquid turns raspberry red – a proof that the reaction is basic. Unheated piece of marble does not give such a reaction. The marble was pyrolysed, and the CaO product gives basic reaction with water. CaCO3(s) → CaO(s) + CO2(g) CaO(s) + H2O(l) → Ca2+(aq) + 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: Мермер на жар
- Парченце мермер се жари на пламен од гасна греалка. Потоа се става во воден раствор од фенолфталеин. Течноста се бои малиновоцрвено – доказ за базна реакција. Нежарено парче мермер не дава таква реакција. Доаѓа до пиролиза при која еден од продуктите (калциум оксид) со вода дава базна реакција: CaCO3(s) → CaO(s) + CO2(g) CaO(s) + H2O(l) → Ca2+(aq) + 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 | 11:05, 3 September 2021 | 51 s, 1,920 × 1,080 (48.03 MB) | Dandarmkd (talk | contribs) | Uploaded own work with UploadWizard |
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