cleaning agent for centuries. Studies have shown that the vinegar needs to have a concentration of 7-12% w/v* before it is an effective cleaning agent. Vinegar that has this concentration can be used as an altemative to synthetic cleaning agents. weight 100 volume The student showed this information to their Chemistry class, and the class decided to analyse a sample of white vinegar' from the supermarket to determine the concentration of acetic acid (CH.COOH). A conductimetric titration was carried out. A 25.00 ml. sample was taken of the vinegar and diluted to 250 ml. in a volumetric flask. As 25.00 ml. portion of this diluted solution was titrated using standardised 0.120 moll. sodium hydroxide solution. The conductivity of the diluted vinegar solution was taken. 1.00 ml. of NaOH solution was then added in increments, the mixture stirred, and the new conductivity was taken after cach addition. The results of the titration are shown in the table. NaOH added (ml) Conductivity (S m") 130 1.0 110 2.0 104 3.0 97 4.0 90 5.0 84 6.0 76 7.0 70 8.0 65 9.0 70 10.0 98 11.0 122 12.0 148 13.0 171 14.0 198 15.0 220 By drawing a best-fit conductivity graph of the data in the table and performing relevant calculations, determine whether the vinegar was of the required concentration to be an effective cleaning agent.
cleaning agent for centuries. Studies have shown that the vinegar needs to have a concentration of 7-12% w/v* before it is an effective cleaning agent. Vinegar that has this concentration can be used as an altemative to synthetic cleaning agents. weight 100 volume The student showed this information to their Chemistry class, and the class decided to analyse a sample of white vinegar' from the supermarket to determine the concentration of acetic acid (CH.COOH). A conductimetric titration was carried out. A 25.00 ml. sample was taken of the vinegar and diluted to 250 ml. in a volumetric flask. As 25.00 ml. portion of this diluted solution was titrated using standardised 0.120 moll. sodium hydroxide solution. The conductivity of the diluted vinegar solution was taken. 1.00 ml. of NaOH solution was then added in increments, the mixture stirred, and the new conductivity was taken after cach addition. The results of the titration are shown in the table. NaOH added (ml) Conductivity (S m") 130 1.0 110 2.0 104 3.0 97 4.0 90 5.0 84 6.0 76 7.0 70 8.0 65 9.0 70 10.0 98 11.0 122 12.0 148 13.0 171 14.0 198 15.0 220 By drawing a best-fit conductivity graph of the data in the table and performing relevant calculations, determine whether the vinegar was of the required concentration to be an effective cleaning agent.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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I need help with this questions of calculations
Transcribed Image Text:2.
A student was looking for an altermative to the cleaning agent they used at home. They
found the information shown below.
Vinegar - an alternative to harsh chemical cleaning agents?
Vinegar is a solution of acetic (ethanoic) acid in water. Vinegar has been used as a
cleaning agent for centuries. Studies have shown that the vinegar needs to have a
concentration of 7-12% w/v* before it is an effective cleaning agent. Vinegar that has
this concentration can be used as an alternative to synthetic cleaning agents.
w/y nE L00
volume
weight
*w/v-
The student showed this information to their Chemistry class, and the class decided to
analyse a sample of "white vinegar' from the supermarket to determine the concentration
of acetic acid (CH:COOH).
A conductimetric titration was carried out.
A 25.00 ml sample was taken of the vinegar and diluted to 250 mL in a volumetric flask.
As 25.00 ml. portion of this diluted solution was titrated using standardised 0.120 moll
sodium hydroxide solution. The conductivity of the diluted vinegar solution was taken.
1.00 ml. of NaOH solution was then added in increments, the mixture stirred, and the
new conductivity was taken after each addition.
The results of the titration are shown in the table.
NaOH added (ml.)
Conductivity (S m)
130
1.0
110
2.0
104
3.0
97
4.0
90
5.0
84
6.0
76
7.0
70
8.0
65
9.0
70
10.0
98
11.0
122
12.0
148
13.0
171
14.0
198
15.0
220
By drawing a best-fit conductivity graph of the data in the table and performing relevant
calculations, determine whether the vinegar was of the required concentration to be an
effective cleaning agent.
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