Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Acid in Carbonated Beverages Experiment
Description: Determine the molarity and standard deviation of citric acid via soda and sodium hydroxide titration
Description: Determine the molarity and standard deviation of citric acid via soda and sodium hydroxide titration
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Acid in Carbonated Beverages Report
Methods
In Procedure 1, 40 mL of 7-Up was diluted to 100 mL
...
0491 M NaOH solution was filled
to 0
...
Since the soda was clear, phenolphthalein was used as the indicator dye
...
The soda was then titrated 5 times
...
Mean and standard
deviation of molarity were determined for the titrations that used the phenolphthalein indicator
dye
...
The soda was green so
titration had to be done using a pH electrode
...
The soda was titrated 3 times
...
Results
Procedure #1
Titration using 7-Up
Molarity:
First, find moles of NaOH
NaOH - 0
...
19mL ×
1
=
...
0491 = 8
...
0491 M
Titration 2
18
...
64mL ×
Volume – 18
...
01890 L × 0
...
28 × 10− 4 mol NaOH
1000mL
NaOH - 0
...
19 mL
Volume – 18
...
01864 L × 0
...
15 × 10− 4 mol NaOH
1000mL
NaOH - 0
...
15mL ×
Volume – 18
...
01815L × 0
...
91 × 10− 4 mol NaOH
1000mL
Now convert moles of NaOH to moles of C 6 H 8 O 7 using the following balanced equation:
3−
C6 H 8O7 ( aq) + 3OH − ( aq) → 3H 2O (l ) + C6 H 5O7 ( aq)
Titration 1
Titration 2
Titration 3
Titration 4
8
...
98 × 10− 4 mol C 6 H 8 O 7
3mol
9
...
09 × 10− 4 mol C 6 H 8 O 7
3mol
9
...
05 × 10− 4 mol C 6 H 8 O 7
3mol
8
...
97 × 10− 4 mol C 6 H 8 O 7
3mol
Calculate molarity of C 6 H 8 O 7
Titration 1
Titration 2
Titration 3
Titration 4
M=
2
...
45 × 10− 3 M C 6 H 8 O 7
...
09 × 10−4
= 7
...
04
M=
3
...
63 × 10− 3 M C 6 H 8 O 7
...
97 × 10−4
= 7
...
04
Find the mean using molarity of C 6 H 8 O 7
7
...
73 × 10−3 M + 7
...
43 × 10−3 M
= 7
...
56 × 10−3 M − 7
...
1 × 10−4
7
...
73 × 10−3 M = −1
...
1 × 10−4 )2 + ( −1
...
3 × 10−4 )2 =
1
...
89 × 10−8 + 4
...
69 × 10−8
=
4 −1= 3
7
...
63 × 10−3 M = −7 × 10−5
( 2
...
56 × 10−3 M − 7
...
3 × 10−4
1
...
Titration #1 using Jones Green Apple
The end point occurs roughly at 25
...
57
Titration #2 using Jones Green Apple
The end point occurs roughly at 25
...
39
...
00 mL where the pH is 8
...
First, find moles of NaOH
NaOH - 0
...
70mL ×
1
=
...
0491 = 1
...
0491 M
Titration 2
25
...
00mL ×
Volume – 25
...
02595L × 0
...
27 × 10− 3 mol NaOH
1000mL
NaOH - 0
...
70 mL
Volume – 27
...
027 L × 0
...
33 × 10− 3 mol NaOH
1000mL
Now convert moles of NaOH to moles of C 6 H 8 O 7 using the following balanced equation:
3−
C6 H 8O7 ( aq) + 3OH − ( aq) → 3H 2O (l ) + C6 H 5O7 ( aq)
Titration 1
Titration 2
Titration 3
1
...
2 × 10− 4 mol C 6 H 8 O 7
3mol
1
...
23 × 10− 4 mol C 6 H 8 O 7
3mol
1
...
43 × 10− 4 mol C 6 H 8 O 7
3mol
Calculate molarity of C 6 H 8 O 7
Titration 1
Titration 2
Titration 3
M=
4
...
1 × 10− 2 M C 6 H 8 O 7
...
23 × 10−4
= 2
...
02
M=
4
...
22 × 10− 2 M C 6 H 8 O 7
...
1 × 10−2 M + 2
...
22 × 10−2 M
= 6
...
44 × 10−2 M − 2
...
34 × 10−2
( 4
...
32 × 10−2 )2 + ( 4
...
44 × 10−2 M − 2
...
32 × 10−2
1
...
87 × 10−3 + 1
...
44 × 10−2 M − 2
...
22 × 10−2
( 2
...
26 × 10−2
1
2
=
Title: Acid in Carbonated Beverages Experiment
Description: Determine the molarity and standard deviation of citric acid via soda and sodium hydroxide titration
Description: Determine the molarity and standard deviation of citric acid via soda and sodium hydroxide titration