Question 1 (2 points) What is the technique that uses a solution of known concen

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Question 1 (2 points)

What is the technique that uses a solution of known concentration to analyze another solution?

Question 1 options:

Standardization

Titration

Saturation

Equivalent points

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Question 2 (2 points)

What is the term for an acid that has one transferable H+?

Question 2 options:

Strong acid

Equivalent acid

Weak acid

Diprotic acid

Monoprotic acit

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Question 3 (2 points)

What is the term for an acid that has two transferable H+?

Question 3 options:

Weak acid

Equivalent acid

Diprotic acid

Strong acid

Monoprotic acit

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Question 4 (3 points)

What is the term for point at which the amount of acid and base in a titration are chemically the same?

Question 4 options:

Saturation point

Titration point

Half-equivalence point

Equivalence point

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Question 5 (3 points)

What is the term for point in a titration where no further titrant should be added?

Question 5 options:

pKa of the acid

Ka of the acid

Titration point

End-point

Equivalence point

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Question 6 (3 points)

To determine the pKa of an acid, you must look at the pH measured at a particular point in the titration. What is that point?

Question 6 options:

Half-equivalence point

Equivalence point

Titration point

Ka of an acid

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Question 7 (3 points)

Following the procedure for this experiment, 0.517 g of an unknown, weak monoprotic acid was titrated with 0.100M NaOH. The titration was monitored with a pH meter. The data obtained are shown in this table and accompanying graph.

Calculate the number of equivalents of NaOH required to reach the equivalent point and express the answer using the units equiv. Create your own graph if necessary.

Question 7 options:

0.0306 equivalents

9.0 equivalents

0.0034 equivalents

34 equivalents

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Question 8 (3 points)

If the number of equivalents NaOH needed to titrate a monoprotic acid is 0.085, determine the number of equivalents of acid titrated.

Your Answer:Question 8 options:

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Question 9 (3 points)

In your experiment 0.014 g of an unknown monoprotic acid were titrated against NaOH and 2.13 equivalents were needed to neutralize the acid. Determine the equivalent (molar) mass of the unknown acid.

Your Answer:Question 9 options:

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Question 10 (3 points)

A monoprotic acid (0.852 g) was titrated with 0.0056 equivalents of NaOH. The equivalent point was at the pH 6.82. Determine the pKa of the unknown acid.

Your Answer:Question 10 options:

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Question 11 (3 points)

If the pKa for an unknown acid is (5.5x10^0), calculate the Ka of the acid.

Note: Your answer is assumed to be reduced to the highest power possible.

Your Answer:

A)

Standardization

B)

Titration

C)

Saturation

D)

Equivalent points

Explanation / Answer

1 ) B ) titration

2) E ) monoprotic acid

3) C ) diprotic acid

4) D ) equivalence point

5) D ) end point

6) A ) Half -eqivalece point

7)  

8) acid = moles

     so answer = 0.085

13)

pKa = 5.5 x 10^0

Ka = 10^-pKa

Ka = 10^-5.5

Ka = 3.16 x 10^-6

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