Volumetric Analysis- AcidBase Titration Using Indicators

Volumetric Analysis - Acid/Base Titration Using Indicators Excel Template

Chem1310 Laboratory Copyright (c) 2003 Tatsuya Maehigashi

Chem1310Name: Partner's Name:Section: B3Date of Experiment Performed: 9-SepDate of Report Prepared: 25-Sep

Volumetric Analysis- Acid/Base Titration Using Indicators

Part I: Standardization of NaOH Solution

-Dealing with Significant Figures

Tabulated Data Trial 1 Trial 2 Trial 3

0.3499 0.3881

0.00 0.00

35.59 40.10

-Mathematical Calculation Directly on Excel

Useful Units204.22

*MW=Molecular Weight

Tabulated Results Trial 1 Trial 2 Trial 3

35.59 40.1

0.001713 0.001900

0.001713 0.001900

0.04814 0.04739Average Molarity of NaOH (M) 0.047765

Mass KHP (g)

Initial buret reading NaOH (mL)

Final buret reading NaOH (mL)

MW* of KHP (g/mol)

Volume used NaOH (mL)

Moles KHP

Moles NaOH in dispensed volume

Molarity NaOH solution (M)

It's a great idea to list any "Literature Value" that you need to use in your calculation. Note that KHP is "potassium hydrogen phthalate" (KHC8H4O4)

"Hint"The formula for the Moles KHP Trial 1 should be

=E28/$D$45"$" is placed so that cell D45 (MW of KHP) is

fixed and won't move when you "Click" "Hold" & "Drag to the right" to complete the calculation

for the rest of trials. See Excel Instruction - "Calculations in Excel 1"

for more detailed instructions.

"Unit" is already supplied in each category, so input only numerical values here.

Enter your data (Numerical Values ONLY. Do not inclue unit.) into the following table "Taburated Data". Then, Format each cell to show correct significant figures. See Excel Instruction - "Adjusting Significant Figures in Excel" on WebCT for the detailed instructions. You may omit any trial you didn't perform.

Using the data you just entered above, complete the following table "Tabulated Results". You should complete this section by calculating directly on this spreadsheet using Excel. No calculator is allowed. See Excel Instruction - "Calculations in Excel 1" on WebCT for the detailed instructions.

Acid:Base ratio between KHP and NaOH is 1:1. You needed certain amount of NaOH to react with known moles of KHP, thus moles of NaOH in the dispensed volume should be…?

Input only numerical values here. Be sure to show appropriate Sig. Fig.

Remember, Molarity (M) is moles per Liter

Your SRS serves as your "Laboratory Notebook", where original and permanent record of your work is kept, and you are required to submit your SRS with your completed assignment every week. However, since you will be completing your calculation/analysis on Excel Spreadsheet, you are not required to complete your SRS (Your TA will only check your "collected data" to prove your work) unless otherwise noted in the "Assignment Instruction".

Remember the following rules about Significant Figures in our Lab

Graduated Cylinder - Decimal Place is 1* (eg. 5.6 mL) Thermometer - Decimal Place is 1 (eg. 24.3 °C)

Volumetric Pipet - Decimal Place is 2 (eg. 10.00 mL) Buret - Decimal Place is 2 (eg. 34.64 mL)

Analytical Balance - Decimal Place is 4 ~ 5 (eg. 15.1538 or 15.15383g)

*You can read to 2nd decimal on some graduated cylinder

A B C D E F G H I J1234567

8

910111213141516

17

18

19202122232425262728

29

3031323334353637383940414243444546474849

50

51

52535455565758596061



-Supporting Calculation

Supporting Calculation

Part II: Titration of Diluted Vinegar

Useful Units

4.7765E-02

Tabulated Data Trial 1 Trial 2 Trial 3

50.1849 50.1849

60.1758 60.1758

25 25

0.99705 0.99705

0.00 0.00

17.75 18.30

Tabulated Results Trial 1 Trial 2 Trial 3

9.9909 9.9909

10.02 10.02

10.02 10.02

17.75 18.30

1.1507E-04 1.1507E-04

1.1507E-03 1.1507E-03

1.1507E-03

Molarity NaOH solution (M) Trial 1 Only

Average Molarity of NaOH standardized (M)

Mass Flask (g)

Mass Flask + water, calibration (g)

Temperature water (°C)

Density water, at observed temp (g/ml)

Initial buret Reading NaOH (ml)

Final buret Reading NaOH (ml)

Mass water, delivered by pipet, calibration (g)

Volume water, delivered by pipet, calibration (ml)

Volume vinegar, delivered (ml)

Volume NaOH delivered (ml)

Molarity Acetic Acid in diluted vinegar (M)

Molarity Acetic Acid in stock vinegar (M)

Average Molarity Acetic Acid in stock vinegar (M)

From Part I (E53). Type = and click the cell E53, then hit "Enter Key". Now it's linked!

See Table B.1 on your manual (Appendix B)

Use the pipet-calibration result. It is NOT 10.00mL

"diluted vinegar" = Acetic acid solution that you made by diluting stock vinegar with water in a volumetric flask. This is the one you titrated.

"stock vinegar" = Original vinegar (undiluted) in stock container.

Show Supporting Calculation for the indicated item. At this point, no strict format is specified for this part of the assignment (Hand writing is absolutely fine). If you'd like to try "Equation Editor", see the Excel Instruction available on WebCT.

Now, utilize the techniques that you have learned so far, complete the following tables according to your obtained laboratory data. Be sure to calculate directly on this spreadsheet (No calculator) and adjust the decimal place so that correct significant figures are shown for each value. Refer to the section "Reporting Data Accuracy - Significant Figures" on your manual regarding Sig. Fig. rules upon basic calculations (+ , - , ¸ and ´).

Use mass & density to compute

A B C D E F G H I J6263646566676869707172737475767778798081828384858687

88

8990919293949596979899100101102103104

105

106

107

108

109110111112

113

114

115

116

117

118119120121122



Supporting Calculations

Molarity Acetic Acid in diluted vinegar (M) Trial 1 Only

Molarity Acetic Acid in stock vinegar (M) Trial 1 Only

Hand-Writing is fine

Hand-Writing is fine

Once finished, print this report (B & W is fine), staple with your actual SRS and other necessary documents (See "Assignment Instruction" for required items), and submit to your TA. Make sure to check/adjust the printing-range before you print this assignment (See Excel Instruction - Page Setup and Printing in Excel 1) .

A B C D E F G H I J123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160



Volumetric Analysis- Acid/Base Titration Using Indicators

"Hint"The formula for the Moles KHP Trial 1 should be

=E28/$D$45"$" is placed so that cell D45 (MW of KHP) is

fixed and won't move when you "Click" "Hold" & "Drag to the right" to complete the calculation

for the rest of trials. See Excel Instruction - "Calculations in Excel 1"

for more detailed instructions.

Enter your data (Numerical Values ONLY. Do not inclue unit.) into the following table "Taburated Data". Then, Format each cell to show correct significant figures. See Excel Instruction - "Adjusting Significant Figures in Excel" on WebCT for the detailed instructions. You may omit any trial you didn't perform.

Using the data you just entered above, complete the following table "Tabulated Results". You should complete this section by calculating directly on this spreadsheet using Excel. No calculator is allowed. See Excel Instruction - "Calculations in Excel 1" on WebCT for the detailed instructions.

Remember, Molarity (M) is moles per Liter

Your SRS serves as your "Laboratory Notebook", where original and permanent record of your work is kept, and you are required to submit your SRS with your completed assignment every week. However, since you will be completing your calculation/analysis on Excel Spreadsheet, you are not required to complete your SRS (Your TA will only check your "collected data" to prove your work) unless otherwise noted in the "Assignment Instruction".

Remember the following rules about Significant Figures in our Lab

Graduated Cylinder - Decimal Place is 1* (eg. 5.6 mL) Thermometer - Decimal Place is 1 (eg. 24.3 °C)

Volumetric Pipet - Decimal Place is 2 (eg. 10.00 mL) Buret - Decimal Place is 2 (eg. 34.64 mL)

Analytical Balance - Decimal Place is 4 ~ 5 (eg. 15.1538 or 15.15383g)

*You can read to 2nd decimal on some graduated cylinder

K L1234567

8

910111213141516

17

18

19202122232425262728

29

3031323334353637383940414243444546474849

50

51

52535455565758596061



From Part I (E53). Type = and click the cell E53, then hit "Enter Key". Now it's linked!

See Table B.1 on your manual (Appendix B)

Use the pipet-calibration result. It is NOT 10.00mL

"diluted vinegar" = Acetic acid solution that you made by diluting stock vinegar with water in a volumetric flask. This is the one you titrated.

"stock vinegar" = Original vinegar (undiluted) in stock container.

If you decide to complete this step by hand-writing, don't forget to do so after printing!

Show Supporting Calculation for the indicated item. At this point, no strict format is specified for this part of the assignment (Hand writing is absolutely fine). If you'd like to try "Equation Editor", see the Excel Instruction available on WebCT.

Now, utilize the techniques that you have learned so far, complete the following tables according to your obtained laboratory data. Be sure to calculate directly on this spreadsheet (No calculator) and adjust the decimal place so that correct significant figures are shown for each value. Refer to the section "Reporting Data Accuracy - Significant Figures" on your manual regarding Sig. Fig. rules upon basic calculations (+ , - , ¸ and ´).

Use mass & density to compute

K L6263646566676869707172737475767778798081828384858687

88

8990919293949596979899100101102103104

105

106

107

108

109110111112

113

114

115

116

117

118119120121122



Once finished, print this report (B & W is fine), staple with your actual SRS and other necessary documents (See "Assignment Instruction" for required items), and submit to your TA. Make sure to check/adjust the printing-range before you print this assignment (See Excel Instruction - Page Setup and Printing in Excel 1) .

K L123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160

Documents

Volumetric Analysis- AcidBase Titration Using Indicators