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This method uses a back titration with potassium thiocyanate to determine the concentration of chloride ions in a solution.
Before the titration an excess volume of a standardized silver nitrate solution is added to the solution containing chloride ions, forming a precipitate of silver chloride (AgCl). The term 'excess' is used as the moles of silver nitrate added are known to exceed the moles of sodium chloride present in the sample so that all the chloride ions present will react.
Ag+ + Cl- AgCl(s) (Ksp = 1.70 × 10−10)
Excess White
Excess of Ag+ is back titrated with SCN-.
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What are complexometric titration method?
Direct titration, Indirect titration, back titration, replacement titration and so on
What difference between titration and back titration?
In fact, a back titration is carried out as in a very similar method to an ordinary titration. the only difference is in the context. Consider an unknown acid solution. Then a known amount of excess alkali was added to the solution and made them react. Then the process of finding the amount left from the alkali is known as the back titration.
What is a volhard method?
It is an indirect titration procedure for the determination of anions that precipitate with silver like CL-, Br-, I-, SCN-, and it is preferred in acid (HNO3) solution (because it prevents the harmful effects seen in other methods in which oxalate, arsenate and carbonate are used. Because these ions form silver salts with poor solubility, but in acidic mediums these salts are not formed). A measured excess of AgNO3 is added to precipitate the anion, and the excess of Ag+ is determined by back titration with standard potassium thiocyanate solution.Dr. Sami
What is a back titration?
A back titration is a form of titraiton in which an excess of standard reagent is added and then the reverse of the titration is carried out.
Why is phenolphthalein an appropiate indicator for back titration?
it's not in all cases. Only for titration of weak acids.
What are complexometric titration method?
Direct titration, Indirect titration, back titration, replacement titration and so on
What difference between titration and back titration?
In fact, a back titration is carried out as in a very similar method to an ordinary titration. the only difference is in the context. Consider an unknown acid solution. Then a known amount of excess alkali was added to the solution and made them react. Then the process of finding the amount left from the alkali is known as the back titration.
What is a volhard method?
It is an indirect titration procedure for the determination of anions that precipitate with silver like CL-, Br-, I-, SCN-, and it is preferred in acid (HNO3) solution (because it prevents the harmful effects seen in other methods in which oxalate, arsenate and carbonate are used. Because these ions form silver salts with poor solubility, but in acidic mediums these salts are not formed). A measured excess of AgNO3 is added to precipitate the anion, and the excess of Ag+ is determined by back titration with standard potassium thiocyanate solution.Dr. Sami
What is a back titration?
A back titration is a form of titraiton in which an excess of standard reagent is added and then the reverse of the titration is carried out.
What is Back titration?
A back titration is a form of titraiton in which an excess of standard reagent is added and then the reverse of the titration is carried out.
When should back titration used instead of back titration?
when we do not know nothing about the other titrant.
Why is phenolphthalein an appropiate indicator for back titration?
it's not in all cases. Only for titration of weak acids.
How do you check the alcohol percentage in wine?
Using a method called back-titration, the alcohol concentration of a grape wine can be determined. Just google steps and procedure of back-titration and find out what standard solution and indicator you will need. :)
What is the chemical process for back titration?
The chemical process for back titration is to titrate the analyte past the original end point/equivalence point, and then BACK titrate the excess titrant to equivalence.
Does anyone know what back titration really is?
no lol
Is an alternative pH indicator practical for the back titration?
No.
Explain the technique of back titration?
it is very good
