Thesis/Dissertation: Lenka Filipová: The Influence of Ions on the Acidity of Frozen Aqueous Solutions
Bachelor's thesis
The Influence of Ions on the Acidity of Frozen Aqueous Solutions
Vliv iontů na kyselost zmrazených vodných roztoků
Abstract
Cílem této práce bylo určení vlivu iontů na acido-bazické poměry na povrchu ledu po zamrazení roztoku. Zamrzlé vodné roztoky pufrů s kresolovou červení jako acido-bazickým indikátorem byly měřeny pomocí UV-Vis spektrofotometrie. Byly mrazeny roztoky pufrů KOH / H3PO4, NH4OH / H3PO4 a NaF / HF o koncentracích 50 − 0,5 mM s rozsahem pH pro fosfáty od 7,5 do 11 a pro fluoridový pufr od 7 do 4. Mrazení …more
Abstract
The aim of this work was to determine the effects of ions on acid-base conditions on the ice surface. Frozen aqueous buffers solutions with cresol red as the acid-base indicator were measured by UV-Vis spectrophotometry. Various buffer solutions of KOH / H3PO4, NH4OH / H3PO4 (pH from 7,5 to 11) and NaF / HF (pH from 7 to 4) concentrations 50 − 0,5 mM were used. Fast freezing at 77 K and slow at 233 …more
27/5/2011 10:38, prof. Mgr. Dominik Heger, Ph.D., UČO 11279
- Entered/Edited 27/6/2011 17:15, Pavla Kupcová
- Record made 22/3/2011 08:41, Pavla Kupcová
- Accessible from: 26/5/2011 09:45, Pavla Kupcová
- Thesis/dissertation received 26/5/2011 09:45, Pavla Kupcová
Supervisor
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