User:Moira M. Esson/Notebook/CHEM-581/2012/08/31: Difference between revisions
From OpenWetWare
(6 intermediate revisions by the same user not shown) | |||
Line 9: | Line 9: | ||
# Make PVOH films by acid catalyzed dehydration in H<sub>2</sub>O. | # Make PVOH films by acid catalyzed dehydration in H<sub>2</sub>O. | ||
# Make a 500mL stock solution for PVOH(MW 22,000) in H<sub>2</sub>O | # Make a 500mL stock solution for PVOH(MW 22,000) in H<sub>2</sub>O | ||
# Create four dilute solutions | # Create four dilute solutions from the prepared PVOH(MW 22,000) stock solution, diluting by 0.75, 0.5, 0.25, and 0.125 | ||
# | # Measure the viscosity of PVOH (MW 22,000) at the diluted concentrations and the stock solution | ||
==PVOH plus acid films== | ==PVOH plus acid films== | ||
Line 44: | Line 44: | ||
|} | |} | ||
*Serial Dilution of PVOH Stock Solution | *Serial Dilution of PVOH Stock Solution | ||
{| {{table}} | |||
| align="center" style="background:#f0f0f0;"|'''Dilution''' | | align="center" style="background:#f0f0f0;"|'''Dilution''' | ||
| align="center" style="background:#f0f0f0;"|''''''M<sub>1 | | align="center" style="background:#f0f0f0;"|''''''M<sub>1'''[mol/L]''' | ||
| align="center" style="background:#f0f0f0;"|''''''V<sub>1 | | align="center" style="background:#f0f0f0;"|''''''V<sub>1''' [mL]''' | ||
| align="center" style="background:#f0f0f0;"|''''''M<sub> | | align="center" style="background:#f0f0f0;"|''''''M<sub>2'''[mol/L]''' | ||
| align="center" style="background:#f0f0f0;"|''''''V<sub> | | align="center" style="background:#f0f0f0;"|''''''V<sub>2''' [mL]''' | ||
|- | |||
| 1||6.38E-4||6.25||7.98E-5||50|| | |||
|- | |||
| 2||6.38E-4||12.5||1.59E-4||50|| | |||
|- | |||
| 3||6.38E-4||25 ||3.19E-4||50|| | |||
|- | |- | ||
| | | 4||6.38E-4||35.5||4.78E-4||50|| | ||
|} | |} | ||
Line 90: | Line 94: | ||
* Average time = 241.01 s | * Average time = 241.01 s | ||
<br> | <br> | ||
* Viscosity of | * Viscosity of 7.98E-5M PVOH in H<sub>2</sub>O at 26°C | ||
{| {{table}} | {| {{table}} | ||
Line 105: | Line 109: | ||
* Average time = 281.49 s | * Average time = 281.49 s | ||
<br> | <br> | ||
* Viscosity of | * Viscosity of 1.59E-4 M PVOH in H<sub>2</sub>O at 26°C | ||
{| {{table}} | {| {{table}} | ||
Line 120: | Line 124: | ||
* Average time = 249.53 s | * Average time = 249.53 s | ||
<br> | <br> | ||
* Viscosity of | * Viscosity of 3.19E-4 M PVOH in H<sub>2</sub>O at 26°C | ||
{| {{table}} | {| {{table}} | ||
Line 144: | Line 148: | ||
*An additional 2-3mL H<sub>2</sub>O was added to each solution to aid in the complete dissolution of the PVOH | *An additional 2-3mL H<sub>2</sub>O was added to each solution to aid in the complete dissolution of the PVOH | ||
*Heat was reduced halfway through dissolving the PVOH because the solutions began to boil too rapidly | *Heat was reduced halfway through dissolving the PVOH because the solutions began to boil too rapidly | ||
*When pouring the ~0.5g PVOH (MW 22000) with HCl there was a small loss of sample when pouring the solution into a Teflon dish | *When pouring the ~0.5g PVOH (MW 22000) with HCl there was a small loss of sample when pouring the solution into a Teflon dish | ||
*Between the sample run of 7.97E-5 M PVOH solution and the sample run of 1.59E-4M PVOH solution, the viscometer was not washed | |||
Revision as of 20:44, 6 September 2012
Project name | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page <html><img src="/images/c/c3/Resultset_previous.png" border="0" /></html>Previous entry<html> </html>Next entry<html><img src="/images/5/5c/Resultset_next.png" border="0" /></html> | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Objectives
PVOH plus acid films
Preparation of PVOH Stock Solutions
Stock Solution Calculations
Viscosity of PVOH (MW 22000) Stock SolutionGeneral Procedure:
Preparation
Observations
Notes
|