User:Karlena L. Brown/Notebook/PVOH Research/2012/11/09: Difference between revisions
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==Titration Procedures & Solution Preparation== | ==Titration Procedures & Solution Preparation== | ||
'''0.1M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:''' | '''0.1M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:''' | ||
* Weigh out ~16. | * Weigh out ~16.802g NaHCO<sub>3</sub> | ||
(Actual NaHCO<sub>3</sub> Mass= 16. | (Actual NaHCO<sub>3</sub> Mass= 16.8046g) | ||
* Add the NaHCO<sub>3</sub> solids to a 250mL closed cap plastic bottle | * Add the NaHCO<sub>3</sub> solids to a 250mL closed cap plastic bottle | ||
* Next, add ~2500mL of H<sub>2</sub>O to the bottle along with large magnetic stir bar | * Next, add ~2500mL of H<sub>2</sub>O to the bottle along with large magnetic stir bar |
Revision as of 13:51, 30 November 2012
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OBJECTIVES
General Formula for reactionsPolyvinyl alcohol + [HoAc]→Polyvinyl acetate Acetylation Reaction Protocol & Film Preparation
REPEAT PROCEDURE ABOVE FOUR TIMES TO PREPARE FOUR FILMS
Acetylation Reaction Calculations1:1 HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (1 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 1.36g HoAc 1.36g HoAc × (1mL HoAc/1.05g HoAc)= 1.30mL HoAc 20% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.2 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.27g HoAc 0.27g HoAc × (1mL HoAc/1.05g HoAc)= 0.26mL HoAc 40% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.4 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.55g HoAc 0.55g HoAc × (1mL HoAc/1.05g HoAc)= 0.52mL HoAc 60% HoAc Reaction Ratio: MW R-CH2CHOH-R: 44.00 g/mol MW Acetic Acid (HoAc): 60.00 g/mol 1.0g PVOH × (1 mol PVOH/44.00g PVOH) × (0.6 mol HoAc/1 mol PVOH) × (60.00g HoAc/1 mol HoAc) = 0.82g HoAc 0.82g HoAc × (1mL HoAc/1.05g HoAc)= 0.78mL HoAc Titration Procedures & Solution Preparation0.1M Sodium Bicarbonate (NaHCO3)solution for titration preparation:
(Actual NaHCO3 Mass= 16.8046g)
Notes
1g PVOH(1 mol PVOH unit/44.06g PVOH) x (1 mol OH/1 mol PVOH)= 0.022696 mol PVOH
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