File:11. Добивање базен оксид.webm

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(WebM audio/video file, VP9/Vorbis, length 49 s, 1,920 × 1,080 pixels, 8.66 Mbps overall, file size: 50.9 MB)

Captions

Captions

Add a one-line explanation of what this file represents

Summary[edit]

Description
Македонски: Експеримент за добивање базeн оксид. Магнезиумова лента се пали го помош на гасна греалка. При горење на магнезиумот се емитира интензивна светлина, при што се образува магнезиум оксид (MgO). Магнезиум оксидот реагира со вода. Промената на бојата на индикаторите (универзален индикатор во првата и фенолфталеин во последната епрувета) потврдуваат дека средината е алкална (базна) поради образуваниот магнезиум хидроксид (Mg(OH)2). Со помош на универзална индикаторска хартија се покажува дека рН-вредноста на овој раствор е околу 8. Равенките на реакциите што се одвиваат се:
(1) 2Mg(s) + O2(g) = 2MgO(s); и
(2) MgO(s) + H2O(l) = Mg(OH)2(aq).
Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.
English: Experiment showing synthesis of a basic oxide. Magnesium ribbon is ignited by burner. Magnesium burns emitting intense light and forming magnesium oxide (MgO). Magnesium oxide reacts with water. The colour change of the indicators (universal indicator in the first and phenolphthalein in the last test tube) indicate alkaline (basic) medium due to the formed magnesium hydroxide (Mg(OH)2). The universal indicator paper shows that the pH value of the solution is around 8. The chemical equations for the above reactions are:
(1) 2Mg(s) + O2(g) = 2MgO(s); and
(2) MgO(s) + H2O(l) = Mg(OH)2(aq).
Planned and performed by Marina Stojanovska, Miha Bukleski and Vladimir Petruševski, Department of Chemistry, FNSM, Ss. Cyril and Methodius University, Skopje, Macedonia.
Date
Source Own work
Author Petrovskyz

Licensing[edit]

I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current00:47, 18 October 201649 s, 1,920 × 1,080 (50.9 MB)Petrovskyz (talk | contribs)User created page with UploadWizard

You cannot overwrite this file.

The following 2 pages use this file:

Transcode status

Update transcode status
Format Bitrate Download Status Encode time
VP9 1080P 1.98 Mbps Completed 03:19, 4 August 2018 2 min 42 s
Streaming 1080p (VP9) 1.91 Mbps Completed 16:59, 7 December 2023 2.0 s
VP9 720P 866 kbps Completed 03:17, 4 August 2018 1 min 34 s
Streaming 720p (VP9) 798 kbps Completed 18:31, 7 December 2023 1.0 s
VP9 480P 493 kbps Completed 03:11, 4 August 2018 1 min 3 s
Streaming 480p (VP9) 424 kbps Completed 17:09, 12 December 2023 11 s
VP9 360P 315 kbps Completed 03:11, 4 August 2018 46 s
Streaming 360p (VP9) 246 kbps Completed 17:10, 12 December 2023 1.0 s
VP9 240P 215 kbps Completed 03:11, 4 August 2018 39 s
Streaming 240p (VP9) 167 kbps Completed 16:07, 21 November 2023 18 s
WebM 360P 572 kbps Completed 22:44, 8 March 2017 1 min 0 s
Streaming 144p (MJPEG) 824 kbps Completed 13:39, 27 October 2023 7.0 s
Stereo (Opus) 66 kbps Completed 07:27, 9 November 2023 2.0 s
Stereo (MP3) 128 kbps Completed 10:24, 27 October 2023 2.0 s

File usage on other wikis

The following other wikis use this file:

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:11._Добивање_базен_оксид.webm&oldid=860935042"