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The following data summarize the results of three titrations of the juice. All v

ID: 1006959 • Letter: T

Question

The following data summarize the results of three titrations of the juice. All volumes are in mL.

Question 3

What is the total acid concentration of the juice in run 1?

Enter Your Answer:        56.753M Incorrect

Question 4

What is the total acid concentration of the juice in run 2?

Enter Your Answer:        50.75M Incorrect

Question 5

What is the total acid concentration of the juice in run 3?

Enter Your Answer:        54.73M Incorrect

Question 6

What is the average total acid concentration of the juice?

Run 1 Run 2 Run 3 Volume of Juice 20.7 27.9 22.3 Initial NaOH buret reading 3.78 2.27 1.54 Final NaOH buret reading 25.84 28.86 24.46

Explanation / Answer

The following data summarize the results of three titrations of the juice. All volumes are in mL.

Run 1

Run 2

Run 3

Volume of Juice

20.7

27.9

22.3

Initial NaOH buret reading

3.78

2.27

1.54

Final NaOH buret reading

25.84

28.86

24.46

Question 3

What is the total acid concentration of the juice in run 1?

If the molarity of NaOH is 0.1 M and the acid is mono protic acid the we will calculate the molarity of acid as follows:

Volume of NaOH used = 25.84-3.78 = 22.06 ml

M1V1 = M2V2

M1 * 20.7 ml= 0.1 M * 22.06 ml

M1= 0.11 M of acid

Question 4

What is the total acid concentration of the juice in run 2?

If the molarity of NaOH is 0.1 M and the acid is mono protic acid the we will calculate the molarity of acid as follows:

Volume of NaOH used = 28.86-2.27 = 26.58 ml

M1V1 = M2V2

M1 * 27.9 ml= 0.1 M * 26.59 ml

M1= 0.095M of acid

Question 5

What is the total acid concentration of the juice in run 3?

If the molarity of NaOH is 0.1 M and the acid is mono protic acid the we will calculate the molarity of acid as follows:

Volume of NaOH used = 24.46-1.54= 22.92 ml

M1V1 = M2V2

M1 * 22.3ml= 0.1 M * 22.92 ml

M1= 0.10 M of acid

Question 6

What is the average total acid concentration of the juice?

0.11+0.095+0.10/3

=0.305/3M

=0.102M

Run 1

Run 2

Run 3

Volume of Juice

20.7

27.9

22.3

Initial NaOH buret reading

3.78

2.27

1.54

Final NaOH buret reading

25.84

28.86

24.46

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