Why is blank titration value greater than back titration?

A blank titration is done without the analyte present to check for possible sources of error in the “blank” solution. 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 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.

Why do we use blank titration?

The titration error can be reduced by using a blank titration because in a blank titration the quantity of titrant required to reach the endpoint in the absence of analyte can be subtracted from the quantity of titrant required to reach the endpoint in the presence of an analyte. This reduces the titration error.

What is the difference between blank titration and main titration?

A blank titration is carried out by titrating a fixed and known concentration of titrant into a solvent with zero analyte. The only difference from the regular titration is the absence of analyte.

What is blank determination?

A blank or blank determination is an analysis of a sample without the analyte or attribute, or an analysis without a sample, i.e. going through all steps of the procedure with the reagents only.

What is difference between Iodometry and Iodimetry?

Iodometry is the quantitative analysis of a solution of an oxidizing agent by adding an iodide that reacts to form iodine whereas iodimetry is a volumetric analysis involving either titration with a standardized solution of iodine.

What is an indicator blank?

Indicator blank or indicator correction. The amount of titrant. (usually in terms of volume) required to produce the same change in the. indicator as that taken to mark the end-point in the titration of the sample. under the same conditions.

What is the difference between sample blank and reagent blank?

What is the difference between a reagent blank and a sample blank? A reagent blank refers to a small positive error in test results that comes from the reagents themselves. A sample blank refers to using the sample for zeroing an instrument during a test procedure.