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  • Potenciometriskā sērskābes un borskābes kopīga titrimetriskā noteikšana

     

    Samples11 Chemistry

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ID number:903281
 
Author:
Evaluation:
Published: 04.03.2011.
Language: Latvian
Level: College/University
Literature: n/a
References: Not used
Extract

Darba uzdevums
1.Titranta (NaOH) standartizācija ar potenciometrisko titrēšanu, lietojot sālsskābes standartšķīdumu.
2.Standartizēto titrantu izmanto sērskābes un borskābes maisījuma titrēšanai ar automātisko titrēšanas aparātu.
Aparatūra un trauki
• Jonometrs EV-74 (pH 0-14);
• Stikla elektrods (indikatorelektrods);
• Ag/AgCl elektrods (salīdzinošais elektrods);
• Mora pipete, 2.klase, 25,00 mL ± 0,06 mL
• Mora pipete, 2.klase, 10,00 mL ± 0,04 mL
• Laboratorijas svari BOECO, 0,00 – 310,00 g ± 0,01 g;
• Vārglāzes 100 mL;
• Mērkolbas, A klase, 250,0 mL ± 0,15 mL ;
Vielas
• HCl, 0,1 mol/L, CAS Nr. 7647-01-0;
• NaOH, ≈ 0,1 mol/L, CAS Nr. 1310-73-2.…

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