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Mashcka [7]
3 years ago
13

"In carrying out a titration of a hydrochloric acid solution with a standard sodium hydroxide solution, a student went beyond th

e end point before reading the volume on the burette. That is, the volume used was larger than the volume required to reach the end point. How will this error affect the calculated concentration of the hydrochloric acid?"
Chemistry
1 answer:
poizon [28]3 years ago
5 0

Answer:

The calculated concentration of HCl will be less than actual.

Explanation:

Suppose during titration, the <em>HCl</em> was taken in burette and the <em>NaOH</em> in the volumetric flask.

Now we will use equivalence formula for the calculation of concentration of HCl.

             N_{1} V_{1} = N_{2} V_{2}

Where L.H.S is for hydrochloric acid and R.H.S is for sodium hydroxide. The terms N and V represent normality and volume respectively.

If we calculate for

                              N_{1} = \frac{N_{2}V_{2} }{V_{1} }

We see that if the volume of the HCl is greater then the concentration of the HCl will be reduced.

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What is the percent composition of hydrogen in vinegar (CH3COOH)?​
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Match each term below with its definition or description.
zubka84 [21]

Answer:

1. Equivalence point

2. Direct titration

3. Primary standard

4. Titrand

5. Back titration

6. Standard solution

7. Titrant

8. Indirect titration

9. End point

10. Indicator

Explanation:

1. The equivalence point is the tiration point at which the quantity or moles  of the added titrant is sufficient or equal to the quantity or moles of the analyte for the neutralization of the solution of the analyte.

2. Direct titration is a method of quantitatively determining the contents of a substance

3. A primary standard is an easily weigh-able representative of the mount of moles contained in a substance

4. A titrand is the substance of unknown concentration which is to be determined

5. The titration method that uses a given amount of an excess reagent to determine the concentration of an analyte is known as back titration

6. A standard solution is a solution of accurately known concentration

7. A titrant is a solution that has a known concentration and which is titrated unto another solution to determine the concentration of the second solution

8. Indirect titration is the process of performing a titration in athe reverse order

9. The end point is the point at which the indicator indicates that the equivalent quantities of the reagents required for a complete reaction has been added

10 An indicator is a compound used to visually determine the pH of a solution.

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