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Chemistry

 Krioskopija
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ID number:440058
 
Author:
Evaluation:
Published: 07.02.2008.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

Krioskopija ir molekulmasas noteikšanas metode, kurā izmanto sasalšanas temperatūras pazemināšanos.
Vispirms aparātā iesver tīru šķīdinātāju, tā svars ir sa g un nosaka tā sasalšanas temperatūru to To kr .Ap satīta papīra caurulīti pirms katra temperatūras nolasījuma viegli jāpiedauza pie termometra. Nolasot temperatūru, pēc iespējas nepārtrauc maisīšanu. Tad ievada 3 reizes pētāmo vielu, katru reizi ar pārdzesēšanas paņēmienu vairākkārt nosakot jauno sasalšanas temperatūru T1 kr, T2 kr, T3 kr . …

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