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ID number:651086
 
Author:
Evaluation:
Published: 02.06.2011.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Pētāmā problēma: Kādu šķīdinātāju izvēlēties, lai iztīrītu taukainu traipu no apģērba?
Hipotēze: Tauku traipi ir jāšķīdina nepolārā šķīdinātājā.
Darba piederumi un vielas: mērcilindrs, 4 mēģenes, metanols, acetons, destilēts ūdens, mēģeņu statīvs, stikla nūjiņa, plastmasas nazītis vai lāpstiņa, neliels kokvilnas auduma gabaliņš ar tauku traipu, 2 papīra strēmeles, marles vai vates gabaliņš, gumijas cimdi.…

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