User:Karlena L. Brown/Notebook/PVOH Research/2012/11/09 - Revision history

Karlena L. Brown: /* Titration Solution Preparation */

Karlena L. Brown — Sat, 15 Dec 2012 06:14:17 GMT

Titration Solution Preparation

←Older revision		Revision as of 06:14, 15 December 2012
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	{\| {{table}}		{\| {{table}}
	\| align="center" style="background:#f0f0f0;"\|'''Sample #'''		\| align="center" style="background:#f0f0f0;"\|'''Sample #'''
-	\| align="center" style="background:#f0f0f0;"\|'''Original KHP Amount (g)'''	+	\| align="center" style="background:#f0f0f0;"\|'''Original KHP Amount Dried (g)'''
	\|-		\|-
	\| 1\|\|6.8079		\| 1\|\|6.8079

Karlena L. Brown: /* Titration Solution Preparation */

Karlena L. Brown — Sat, 15 Dec 2012 06:13:39 GMT

Titration Solution Preparation

←Older revision		Revision as of 06:13, 15 December 2012
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	'''MW NaHCO3: 204.24 g/mol'''		'''MW NaHCO3: 204.24 g/mol'''
	1M KHP × 0.1L H<sub>2</sub>O × (204.24g KHP/1 mol KHP)= 20.424g KHP		1M KHP × 0.1L H<sub>2</sub>O × (204.24g KHP/1 mol KHP)= 20.424g KHP
		+
		+	{\| {{table}}
		+	\| align="center" style="background:#f0f0f0;"\|'''Sample #'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Original KHP Amount (g)'''
		+	\|-
		+	\| 1\|\|6.8079
		+	\|-
		+	\| 2\|\|6.8075
		+	\|-
		+	\| 3\|\|6.8076
		+	\|}

	==Titration Procedures and Preparations==		==Titration Procedures and Preparations==

Karlena L. Brown: /* Titration Procedures and Preparations */

Karlena L. Brown — Sat, 15 Dec 2012 06:07:04 GMT

Titration Procedures and Preparations

←Older revision		Revision as of 06:07, 15 December 2012
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	{\| {{table}}		{\| {{table}}
		+	\| align="center" style="background:#f0f0f0;"\|'''Titration Trial #'''
	\| align="center" style="background:#f0f0f0;"\|'''PVOH Solution (g)'''		\| align="center" style="background:#f0f0f0;"\|'''PVOH Solution (g)'''
	\| align="center" style="background:#f0f0f0;"\|'''Acetic Acid (mL)'''		\| align="center" style="background:#f0f0f0;"\|'''Acetic Acid (mL)'''
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	\| align="center" style="background:#f0f0f0;"\|'''Sodium Bicarbonate Used (mL)'''		\| align="center" style="background:#f0f0f0;"\|'''Sodium Bicarbonate Used (mL)'''
	\|-		\|-
-	\| 1.0043\|\|0.26\|\|2\|\|0.5\|\|42.5\|\|42	+	\| 1\|\|1.0043\|\|0.26\|\|2\|\|0.5\|\|42.5\|\|42
	\|-		\|-
-	\| 1.0052\|\|0.52\|\|2\|\|0.0\|\|43.2\|\|43.2	+	\| 2\|\|1.0052\|\|0.52\|\|2\|\|0.0\|\|43.2\|\|43.2
	\|-		\|-
-	\| 1.0027\|\|0.78\|\|2\|\|0.1\|\|42.8\|\|42.7	+	\| 3\|\|1.0027\|\|0.78\|\|2\|\|0.1\|\|42.8\|\|42.7
	\|}		\|}

Karlena L. Brown: /* Notes */

Karlena L. Brown — Sat, 15 Dec 2012 06:01:48 GMT

Notes

←Older revision		Revision as of 06:01, 15 December 2012
Line 124:		Line 124:
	* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.		* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.
	* For titration, each PVOH solution after the indicator was added blue; however, when titration with the 0.2M NaHCO<sub>3</sub> solution, at equilibrium each solution turned red.		* For titration, each PVOH solution after the indicator was added blue; however, when titration with the 0.2M NaHCO<sub>3</sub> solution, at equilibrium each solution turned red.
		+	* After several hours and days, it was decided that the KHP solution necessary for standardization would not form a homogeneous mixture -- KHP precipate falling out of solution -- therefore, only solid samples would be used. The KHP was not placed into solution for standardization.
	<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->		<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
	\|}		\|}

	__NOTOC__		__NOTOC__

Karlena L. Brown: /* Titration Procedures and Preparations */

Karlena L. Brown — Sat, 15 Dec 2012 05:59:53 GMT

Titration Procedures and Preparations

←Older revision		Revision as of 05:59, 15 December 2012
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	# Begin titrating by turning the stopcock on the burette allowing the 0.2M NaHCO<sub>3</sub> solution to steadily stream out		# Begin titrating by turning the stopcock on the burette allowing the 0.2M NaHCO<sub>3</sub> solution to steadily stream out
	# Slow the pace of the 0.2M NaHCO<sub>3</sub> solution to drops when the PVOH solution begins to turn red in color		# Slow the pace of the 0.2M NaHCO<sub>3</sub> solution to drops when the PVOH solution begins to turn red in color
-	# Once the solution completely to turns red, stop titrating by turning the stopcock to '''~~off~~''' position	+	# Once the solution completely to turns red, stop titrating by turning the stopcock to '''OFF''' position
	# Record the new 0.2M NaHCO<sub>3</sub> volume within the burette		# Record the new 0.2M NaHCO<sub>3</sub> volume within the burette

Karlena L. Brown: /* Titration Procedures and Preparations */

Karlena L. Brown — Sat, 15 Dec 2012 05:51:20 GMT

Titration Procedures and Preparations

←Older revision		Revision as of 05:51, 15 December 2012
Line 91:		Line 91:
	# In a clean burette, pour in the 0.2M NaHCO<sub>3</sub> solution until it reaches the top		# In a clean burette, pour in the 0.2M NaHCO<sub>3</sub> solution until it reaches the top
	# Turn the stopcock at the bottom of the burette to allow the solution to pass through the tip		# Turn the stopcock at the bottom of the burette to allow the solution to pass through the tip
-	# ~~Run~~ the solution ~~through~~ the burrette until ~~the~~ 0.2M NaHCO<sub>3</sub> solution volume reaches the 0.00mL calibration mark	+	# In a clean beaker, run the solution from the burrette until 0.2M NaHCO<sub>3</sub> solution volume reaches the 0.00mL calibration mark
	# Record the initial starting point and then turn on the stir plate beneath the burette		# Record the initial starting point and then turn on the stir plate beneath the burette
	# Next, place one of the acetylation PVOH solutions onto the stir plate		# Next, place one of the acetylation PVOH solutions onto the stir plate
	# While stirring the PVOH solution, add ~2 drops of bromothymol blue indicator		# While stirring the PVOH solution, add ~2 drops of bromothymol blue indicator
	# Begin titrating by turning the stopcock on the burette allowing the 0.2M NaHCO<sub>3</sub> solution to steadily stream out		# Begin titrating by turning the stopcock on the burette allowing the 0.2M NaHCO<sub>3</sub> solution to steadily stream out
-	# Slow the pace of the 0.2M NaHCO<sub>3</sub> to drops when the PVOH solution begins to turn red in color	+	# Slow the pace of the 0.2M NaHCO<sub>3</sub> solution to drops when the PVOH solution begins to turn red in color
	# Once the solution completely to turns red, stop titrating by turning the stopcock to '''off''' position		# Once the solution completely to turns red, stop titrating by turning the stopcock to '''off''' position
	# Record the new 0.2M NaHCO<sub>3</sub> volume within the burette		# Record the new 0.2M NaHCO<sub>3</sub> volume within the burette

Karlena L. Brown: /* Notes */

Karlena L. Brown — Sat, 15 Dec 2012 05:39:07 GMT

Notes

←Older revision		Revision as of 05:39, 15 December 2012
Line 124:		Line 124:
	* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.		* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.
	* For titration, each PVOH solution after the indicator was added blue; however, when titration with the 0.2M NaHCO<sub>3</sub> solution, at equilibrium each solution turned red.		* For titration, each PVOH solution after the indicator was added blue; however, when titration with the 0.2M NaHCO<sub>3</sub> solution, at equilibrium each solution turned red.
-	* Due to so much 0.2M NaHCO<sub>3</sub> solution used for titration, in regards to standardization, the amounts of dried KHP needed will have to be re-evaluated. Only thirds of the original amounts measured out will be used for standardization.
	<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->		<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
	\|}		\|}

	__NOTOC__		__NOTOC__

Karlena L. Brown: /* Notes */

Karlena L. Brown — Sat, 15 Dec 2012 05:37:49 GMT

Notes

←Older revision		Revision as of 05:37, 15 December 2012
Line 123:		Line 123:
	* In addition, the 1:1 HoAc ratio solution overheated by boiling; therefore, this solution was not used for the titration analysis.		* In addition, the 1:1 HoAc ratio solution overheated by boiling; therefore, this solution was not used for the titration analysis.
	* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.		* Also the actual amount of NaHCO<sub>3</sub> used was 16.8046g; it is not necessary to prepare solution in a volumetric flask because the solution will be standardize to find the actual concentration.
-		+	* For titration, each PVOH solution after the indicator was added blue; however, when titration with the 0.2M NaHCO<sub>3</sub> solution, at equilibrium each solution turned red.
		+	* Due to so much 0.2M NaHCO<sub>3</sub> solution used for titration, in regards to standardization, the amounts of dried KHP needed will have to be re-evaluated. Only thirds of the original amounts measured out will be used for standardization.
	<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->		<!-- ##### DO NOT edit below this line unless you know what you are doing. ##### -->
	\|}		\|}

	__NOTOC__		__NOTOC__

Karlena L. Brown: /* Titration Procedures & Solution Preparation */

Karlena L. Brown — Sat, 15 Dec 2012 05:32:50 GMT

Titration Procedures & Solution Preparation

←Older revision		Revision as of 05:32, 15 December 2012
Line 66:		Line 66:
	0.82g HoAc × (1mL HoAc/1.05g HoAc)= 0.78mL HoAc		0.82g HoAc × (1mL HoAc/1.05g HoAc)= 0.78mL HoAc

-	==Titration ~~Procedures &~~ Solution Preparation==	+	==Titration Solution Preparation==
	'''0.2M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:'''		'''0.2M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:'''
	* Weigh out ~16.802g NaHCO<sub>3</sub>		* Weigh out ~16.802g NaHCO<sub>3</sub>
Line 76:		Line 76:
	'''MW NaHCO<sub>3</sub>: 84.01 g/mol'''		'''MW NaHCO<sub>3</sub>: 84.01 g/mol'''
	0.2M NaHCO<sub>3</sub> × 1L H<sub>2</sub>O × (84.01g NaHCO<sub>3</sub>/1 mol NaHCO<sub>3</sub>)= 16.802g NaHCO<sub>3</sub>		0.2M NaHCO<sub>3</sub> × 1L H<sub>2</sub>O × (84.01g NaHCO<sub>3</sub>/1 mol NaHCO<sub>3</sub>)= 16.802g NaHCO<sub>3</sub>
		+
		+
		+	'''1M Potassium Hydrogen Phthalate (KHP) solution for titration preparation:'''
		+	* Weigh out ~ 20g KHP and place the solids in a metal pan
		+	(Actual KHP Mass= 20.424g)
		+	* Place the metal pan with the solids in an oven at 120°C for 1 hour to dry
		+	* Once dried, add the KHP solids to a 100mL volumetric flask
		+	* Next, add a large magnetic stir bar to the flask and fill with distilled H2O to the calibrated line
		+	* Allow the mixture to stir for 72 hours
		+	'''MW NaHCO3: 204.24 g/mol'''
		+	1M KHP × 0.1L H<sub>2</sub>O × (204.24g KHP/1 mol KHP)= 20.424g KHP
		+
		+	==Titration Procedures and Preparations==
		+	# In a clean burette, pour in the 0.2M NaHCO<sub>3</sub> solution until it reaches the top
		+	# Turn the stopcock at the bottom of the burette to allow the solution to pass through the tip
		+	# Run the solution through the burrette until the 0.2M NaHCO<sub>3</sub> solution volume reaches the 0.00mL calibration mark
		+	# Record the initial starting point and then turn on the stir plate beneath the burette
		+	# Next, place one of the acetylation PVOH solutions onto the stir plate
		+	# While stirring the PVOH solution, add ~2 drops of bromothymol blue indicator
		+	# Begin titrating by turning the stopcock on the burette allowing the 0.2M NaHCO<sub>3</sub> solution to steadily stream out
		+	# Slow the pace of the 0.2M NaHCO<sub>3</sub> to drops when the PVOH solution begins to turn red in color
		+	# Once the solution completely to turns red, stop titrating by turning the stopcock to '''off''' position
		+	# Record the new 0.2M NaHCO<sub>3</sub> volume within the burette
		+
		+	'''REPEAT THE ABOVE STEPS AGAIN FOR THE NEXT THREE PVOH SOLUTIONS'''
		+
		+	{\| {{table}}
		+	\| align="center" style="background:#f0f0f0;"\|'''PVOH Solution (g)'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Acetic Acid (mL)'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Bromothymol Blue Indicator (drops)'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Initial Burette Volume(mL)'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Final Burette Volume(mL)'''
		+	\| align="center" style="background:#f0f0f0;"\|'''Sodium Bicarbonate Used (mL)'''
		+	\|-
		+	\| 1.0043\|\|0.26\|\|2\|\|0.5\|\|42.5\|\|42
		+	\|-
		+	\| 1.0052\|\|0.52\|\|2\|\|0.0\|\|43.2\|\|43.2
		+	\|-
		+	\| 1.0027\|\|0.78\|\|2\|\|0.1\|\|42.8\|\|42.7
		+	\|}

	==Notes==		==Notes==

Karlena L. Brown: /* Titration Procedures & Solution Preparation */

Karlena L. Brown — Fri, 30 Nov 2012 20:58:18 GMT

Titration Procedures & Solution Preparation

←Older revision		Revision as of 20:58, 30 November 2012
Line 67:		Line 67:

	==Titration Procedures & Solution Preparation==		==Titration Procedures & Solution Preparation==
-	'''0.1M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:'''	+	'''0.2M Sodium Bicarbonate (NaHCO<sub>3</sub>)solution for titration preparation:'''
	* Weigh out ~16.802g NaHCO<sub>3</sub>		* Weigh out ~16.802g NaHCO<sub>3</sub>
	(Actual NaHCO<sub>3</sub> Mass= 16.8046g)		(Actual NaHCO<sub>3</sub> Mass= 16.8046g)
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	* 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
	* Place container on a stir plate and stir solution for ~10 minutes until all solids dissipate		* Place container on a stir plate and stir solution for ~10 minutes until all solids dissipate
		+
		+	'''MW NaHCO<sub>3</sub>: 84.01 g/mol'''
		+	0.2M NaHCO<sub>3</sub> × 1L H<sub>2</sub>O × (84.01g NaHCO<sub>3</sub>/1 mol NaHCO<sub>3</sub>)= 16.802g NaHCO<sub>3</sub>

	==Notes==		==Notes==

←Older revision		Revision as of 06:14, 15 December 2012
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	{\| {{table}}		{\| {{table}}
	\| align="center" style="background:#f0f0f0;"\|'''Sample #'''		\| align="center" style="background:#f0f0f0;"\|'''Sample #'''
-	\| align="center" style="background:#f0f0f0;"\|'''Original KHP Amount (g)'''	+	\| align="center" style="background:#f0f0f0;"\|'''Original KHP Amount Dried (g)'''
	\|-		\|-
	\| 1\|\|6.8079		\| 1\|\|6.8079

←Older revision		Revision as of 06:07, 15 December 2012
Line 103:		Line 103:

	{\| {{table}}		{\| {{table}}
		+	\| align="center" style="background:#f0f0f0;"\|'''Titration Trial #'''
	\| align="center" style="background:#f0f0f0;"\|'''PVOH Solution (g)'''		\| align="center" style="background:#f0f0f0;"\|'''PVOH Solution (g)'''
	\| align="center" style="background:#f0f0f0;"\|'''Acetic Acid (mL)'''		\| align="center" style="background:#f0f0f0;"\|'''Acetic Acid (mL)'''
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	\| align="center" style="background:#f0f0f0;"\|'''Sodium Bicarbonate Used (mL)'''		\| align="center" style="background:#f0f0f0;"\|'''Sodium Bicarbonate Used (mL)'''
	\|-		\|-
-	\| 1.0043\|\|0.26\|\|2\|\|0.5\|\|42.5\|\|42	+	\| 1\|\|1.0043\|\|0.26\|\|2\|\|0.5\|\|42.5\|\|42
	\|-		\|-
-	\| 1.0052\|\|0.52\|\|2\|\|0.0\|\|43.2\|\|43.2	+	\| 2\|\|1.0052\|\|0.52\|\|2\|\|0.0\|\|43.2\|\|43.2
	\|-		\|-
-	\| 1.0027\|\|0.78\|\|2\|\|0.1\|\|42.8\|\|42.7	+	\| 3\|\|1.0027\|\|0.78\|\|2\|\|0.1\|\|42.8\|\|42.7
	\|}		\|}