Why do we do residual titration?
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Why do we do residual 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 the difference between direct titration and residual titration?
The main difference between back titration and direct titration is that a back titration determines the concentration of the unknown by determining the remaining amount of the compound with a known concentration whereas a direct titration directly measures the concentration of the unknown compound.
What is meant by back titrate?
chemistry. : to titrate back to the end point after it has been passed.
What is displacement titration?
In a displacement titration the analyte displaces a reagent, usually from a complex, and the amount of displaced reagent is determined by an appropriate titration. Acid–base titrations use a strong acid or a strong base as a titrant. The most common titrant for a complexation titration is EDTA.
What is back and blank titration?
Back titration is also referred to as indirect titration. Blank 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 the principle of titration?
The basic principle of the titration is the following: A solution – a so called titrant or standard solution – is added to sample to be analyzed. The titrant contains a known concentration of a chemical which reacts with the substance to be determined. The titrant is added by means of a burette.
How many types of complexometric titration are there?
Direct titration: the cations are titrated directly with standard solution EDTA using eriochrome black T as the indicator. Back titration: a known excess of standard solution EDTA is added to the solution containing the analyte.