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ID number:391897
 
Author:
Evaluation:
Published: 23.09.2005.
Language: Latvian
Level: Secondary school
Literature: 9 units
References: Not used
Extract

Pie trešās grupas elementiem pieder alumīnijs (Al), bors (B), gallijs (Ga), indijs (In), skandijs (Sc), tallijs (Tl), itrijs (Y), kā arī lantanoīdi un aktinoīdi.
Šos elementus var noteikt fotometriski, gravimetriski un titrimetriski. Elementu noteikšana balstās galvenokārt uz krāsainu (fotometriska un titrimetriska analīze) vai nešķīstošu (gravimetrija) kompleksu veidošanos.
Alizarīns (1) un alizarīna sarkanais (2) tiek izmantoti Al3+ fotometriskai noteikšanai. Alizarīna sarkanais tiek izmantots arī Ga3+, La3+, un Sc3+ fotometriskai noteikšanai.…

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