Difference Between Titration and Back Titration

In a direct titration, you add a standard titrant to the analyte until you reach the end point. In a back titration, you add an excess of standard titrant to the analyte, and then you titrate the excess titrant to determine how much is in excess.

1. What is a back titration?
2. What is a back titration used for?
3. Why is back titration used instead of direct titration?
4. What is back titration give example?
5. How do you perform a back titration?
6. Why is back titration used in aspirin?
7. Which titration is more accurate?
8. What are the 4 types of titration?
9. What is back titration and blank titration?
10. What does equivalence point mean in titration?
11. Why is back titration method used to determine the amount of CaCO3 in toothpaste instead of a direct titration?

What is a back titration?

A technique in volumetric analysis in which a known excess amount of a reagent is added to the solution to be estimated. The unreacted amount of the added reagent is then determined by titration, allowing the amount of substance in the original test solution to be calculated.

What is a back titration used for?

Back titration is used in the analysis of compounds that are insoluble in water but soluble in acid. (There are other applications as well.) An excess of acid is added to the solid and the remaining acid is titrated against a standard solution of alkali.

Why is back titration used instead of direct titration?

A back titration is used when the molar concentration of an excess reactant is known, but the need exists to determine the strength or concentration of an analyte. ... When direct titration endpoint would be hard to discern (e.g., weak acid and weak base titration) When the reaction occurs very slowly.

What is back titration give example?

Back titration works in the following manner (with an example) : 1: The substance or solution of unknown concentration (4 gm of contaminated chalk, CaCO3 ) is made to react with known volume and concentration of intermediate reactant solution (200 ml, 0.5N HCl). The reaction goes past the equivalence point.

How do you perform a back titration?

5 Simple Steps in Back Titration Calculations:

1. Determine the amount of C required in the titration.
2. Using stoichiometry, find the amount of A that reacted with C in the titration.
3. Note that amount of A that reacted with C in the titration = amount of A that did not react with B in the earlier reaction.

Why is back titration used in aspirin?

Using titration it would be difficult to identify the end point because aspirin is a weak acid and reactions may proceed slowly. Using back titration the end-point is more easily recognised in this reaction, as it is a reaction between a strong base and a strong acid.

Which titration is more accurate?

Standardization is a procedure which normalizes the titration system and provides the most accurate titrant concentration. This value is critical in the final calculation for the analyte content. If the concentration is not known precisely, it can throw off a result.

What are the 4 types of titration?

Types of Titration

• Acid-base Titrations.
• Redox Titrations.
• Precipitation Titrations.
• Complexometric Titrations.

What is back titration and blank titration?

So you would do a blank titration to find the concentration of H3O+ in the water and use it to correct the conentration of your analyte. A back titration is used when it is diffucult to find an endpoint in a normal titration (for example, if the analyte is not very soluble in water).

What does equivalence point mean in titration?

Equivalence point: point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution. At the equivalence point in an acid-base titration, moles of base = moles of acid and the solution only contains salt and water.

Why is back titration method used to determine the amount of CaCO3 in toothpaste instead of a direct titration?

Instead of using standard titration methods where an acid is titrated directly using a standard solution of a base, back titration is used because the sample to be analysed, CaCO3 does not dissolve in water.