What is meant by potentiometric titration?
Potentiometric titration is a technique similar to direct titration of a redox reaction. It is a useful means of characterizing an acid. No indicator is used; instead the potential is measured across the analyte, typically an electrolyte solution.
What are the advantages of potentiometric titration Mcq?
Frequently Asked Questions on Potentiometric Titration The main advantage of using this method of titration is it requires less quantity of substances and is an inexpensive method.
What is an advantage of titration?
Titrimetric analysis commonly referred to as volumetric analysis offers distinct advantages over cumbersome gravimetric methods: Speed of analysis. Instantaneous completion of reactions. Greater accuracy due to minimization of material loss involved in decanting, filtration, precipitation or similar operations.
What are the advantages of potentiometric titration over titrimetric methods disadvantages?
Complete answer:
| ADVANTAGES | DISADVANTAGES |
|---|---|
| Accuracy of the end result is good. | Electrolyte used in the reaction must be freshly prepared. |
| This titration can be performed even in the presence of a small amount of solute whose concentration is to be determined. | Variation in electrolyte pH alters the result of titration. |
What is the importance of potentiometry?
Potentiometry is one of the methods of electroanalytical chemistry. It is usually employed to find the concentration of a solute in solution. In potentiometric measurements, the potential between two electrodes is measured using a high impedance voltmeter.
What is the electrode used in potentiometric titrations?
Calomel and silver/silver-chloride electrodes are commonly used in potentiometric titration. In the case of possible interferences of chlorides (as in determination of halides), a mercurous sulfate electrode may be used.
What is the advantage of potentiometry in medical laboratory?
Thus, with advantages such as high sensitivity and rapid detection, the method is widely used in quantitative analyses of substances and kinetic studies, and it can detect organic and inorganic compounds with redox properties.
What are the advantages and disadvantages of redox titration?
It is generally cheap, requiring little in the way of equipment. It does not require a high level of skill. It can often be done rapidly. It is a destructive method often using up relatively large quantities of the substance being analysed.
What is iodometric titration?
Iodometry, known as iodometric titration, is a method of volumetric chemical analysis, a redox titration where the appearance or disappearance of elementary iodine indicates the end point. The iodometric titration is a general method to determine the concentration of an oxidising agent in solution.
What is the advantage of potentiometric titration over volumetric titration?
The main advantage of using Potentiometric titration method is that it is an inexpensive method. It uses small quantities of substances. These kinds of titrations are more sharp and accurate as the equivalence point is not determined by using colored indicators.
What is the principle of potentiometric?
Potentiometric Titration principle of Potentiometry Principle. When the pair of electrodes are placed in the sample solution or analyte it shows the potential difference between two electrodes by addition of the titrant or by the change in the concentration of ions.
Why calomel electrode is used?
Calomel is used as the interface between metallic mercury and a chloride solution in a saturated calomel electrode, which is used in electrochemistry to measure pH and electrical potentials in solutions. This so-called reference electrode allows control of the potential of a working electrode.
What are the advantages of potentiamentric titration?
The key advantage of using this titration method is that it is an economical method.
What are the scientific principles 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.
What is primary indicator used in titration?
Diphenylamne is used as an indicator because it shows a very clear color change from green to violet when end point of the titration is reached. Usually phosphoric acid is added to the Fe2+ solution (ferrous ammonium sulfate) if that is the reductant that is being titrated, so that the Fe3+ product may be stabilized.
What are the steps of titration?
There are 14 steps to titration. (Unless the salt produced in Sodium Chloride ) Using a pipette, put 25cm^3 of hydrochloric acid into a conical flask. Place a few drops of an indicator, usually methyl orange, into the conical flask. Fill a burette up with sodium hydroxide until it reaches the ‘0’ marking at the top.