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File:29. Волшебни пијалаци.ogv

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Summary

Description
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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inception

22 January 2020

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application/ogg

checksum

29f765d6f73bfb6fa55312358df9eae470386fd6

determination method or standard: SHA-1

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20,880,639 byte

duration

28.076 second

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width

1,920 pixel

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current12:29, 22 February 202028 s, 1,920 × 1,080 (19.91 MB)ИнокентијUser created page with UploadWizard

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