What is photometric titration in analytical chemistry?
[¦fōd·ə¦me·trik tī′trā·shən] (analytical chemistry) A titration in which the titrant and solution cause the formation of a metal complex accompanied by an observable change in light absorbance by the titrated solution.
What is the principle of photometric titration?
All such photometric titrations are based upon Beer’s law, A = abc, which states that the absorbance, A , of the solution is directly proportional to the concentration, c, of the absorbing substance; b is the path length, and a is the absorptivity.
What are the types of acid base titration?
There are two basic types of acid base titrations, indicator and potentiometric. In an indicator based titration you add another chemical that changes color at the pH equal to the equivalence point, when the acid and base are in stoichiometric proportions.
What are the advantages of photometric titration?
One of the major advantages of photometric titrations is the ease with which the sensitivity of the measurements can be changed simply by changing the wavelength or the length of the cell path.
What is the principle that spectrophotometric method based on?
Thus, in simple words spectrophotometer is based on the Beer-Lambert Law which states that the amount of light absorbed is directly proportional to the concentration of the solute in the solution and thickness of the solution under analysis.
How are titrations used in real life?
Titration can be used to define oils, fats and similar substances. Specific titration procedures exist to test free fatty acid content, unsaturated fatty acids and trace amounts of water 2. Titration is also used to determine the estimated chain length of fatty acids in a fat.
How are titrations used in everyday life?
Titration is an analytical technique that is widely used in the food industry. It allows food manufacturers to determine the quantity of a reactant in a sample. For example, it can be used to discover the amount of salt or sugar in a product or the concentration of vitamin C or E, which has an effect on product colour.
What can you learn from titrations?
Titration is a technique to determine the concentration of an unknown solution. Knowing the volume of titrant added allows us to determine the concentration of the unknown analyte. Often, an indicator is used to signal the end of the reaction, the endpoint. Titrant and analyte is a pair of acid and base.
What is the main advantage of potentiometric titration?
Advantages of potentiometric titration: It is an economical titration method. It requires a small quantity of substances. There is no need to use indicators for potentiometric titration. The titrations results are accurate as no colour indicators are involved.