File:29. Волшебни пијалаци.ogv

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Original file(Ogg multiplexed audio/video file, Theora/Vorbis, length 28 s, 1,920 × 1,080 pixels, 5.95 Mbps overall, file size: 19.91 MB)

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Македонски: Во пет чаши се ставаат по неколку милилитри:
  • хлороводородна киселина,
  • оцетна киселина или оцет,
  • вода,
  • натриум хидрогенкарбонат и
  • натриум хидроксид.

Кон сите чаши се додава вода со универзален индикатор. Бојата на растворите по додавањето е црвена, светлоцрвена, портокалова, зелена, виолетова, соодветно, што соодветствува на силно кисела, слабо кисела, речиси неутрална (во водата може да има растворено малку јаглерод диоксид, што ја намалува нејзината рН вредност), слабо базна и силно базна средина.

Осмислено и изведено од Марина Стојановска, Миха Буклески и Владимир Петрушевски, Институт за хемија, ПМФ, УКИМ, Скопје.
English: Five glasses contain few milliliters of:
  • hydrochloric acid;
  • acetic acid or vinegar;
  • water;
  • sodium hydrogencarbonate and
  • sodium hydroxide.

Some amount (equal volumes) of water containing universal indicator paper is added in all glasses. The color of the solutions turns red, light red, orange, green, and violet, respectively. They correspond to strong acid, weak acid, neutral (some CO2 may be dissolved in the water decreasing its pH value), weak base and strong base.

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 Карас Студио

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Date/TimeThumbnailDimensionsUserComment
current12:29, 22 February 202028 s, 1,920 × 1,080 (19.91 MB)Инокентиј (talk | contribs)User created page with UploadWizard

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WebM 360P 601 kbps Completed 10:37, 16 November 2023 13 s
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Stereo (Opus) 94 kbps Completed 15:04, 11 November 2023 2.0 s
Stereo (MP3) 128 kbps Completed 16:50, 28 October 2023 2.0 s

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