Back Titration Quiz 9

Created by

Kamran Fateh

Titration

Back Titration

Back titration is a technique used when direct titration is challenging due to slow reactions, insolubility, or unclear endpoints. In this method, an excess of a standard reagent is added to the analyte, and the remaining unreacted reagent is then titrated with another standard solution. This approach is common in determining concentrations of substances like calcium carbonate or ammonia in complex samples.

1 / 6

In a back titration, the analyte is:

Directly titrated with a standard solution

Reacted with an excess of reagent, and the remaining reagent is then titrated

Used to titrate another unknown solution

Mixed with an indicator to observe a color change

2 / 6

Which of the following is a primary reason to use back titration instead of direct titration?

The analyte is very reactive

The reaction between analyte and titrant is slow

The analyte has no clear endpoint

All of the above

3 / 6

Which indicator would be suitable for a back titration involving the titration of excess acid with a base?

Phenolphthalein

Methyl orange

Bromothymol blue

Both a and b

4 / 6

Back titration is often used to determine the concentration of:

Weak acids and bases

Insoluble salts

Strong oxidizing agents

All types of unknown solutions

5 / 6

Back titration can be particularly useful in cases where:

The end-point of direct titration is not clearly observable

The reaction rate is extremely fast

The analyte has a high molar mass

The analyte is a strong acid or base

6 / 6

Which of the following is NOT a common application of back titration?

Determining the content of insoluble materials

Analyzing reactions with slow reaction rates

Measuring strong acids with clear endpoints

Estimating the concentration of compounds without a direct endpoint

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The average score is 67%