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 Vielu pH noteikšana
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ID number:199344
 
Author:
Evaluation:
Published: 27.02.2025.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Time period viewed: 2021 - 2025 years
Extract

1. Pirmā viela – Na2CO3

Kad nātrija karbonāts izšķīst ūdenī, tas sadalās jonos:
Na2CO3→2Na+ + CO32-
Karbonāta joni (CO3) reaģē ar ūdeni, bet nātrijs nehidrolizējas, jo tas ir 1A grupas elements.
Hidrolizācijas procesā karbonāta joni atņem H+ jonu no ūdens un veido OH- jonu, kas veido bāzisko vidi ar pH 11,12, kas redfzāms bildē:
CO32-+H2O→HCO3+OH-
…

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