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Why does a colour change takes place while titrating mohr's salt against potassium dichromate?
From orange to (yellowish) green: It is a powerfull oxidant, used to titrate Fe2+ from Mohr's salt to the oxidised form Fe3+ by the following: Cr2O72−(aq) + 14H+ + 6e− → 2Cr3+(aq) + 7H2O
What is the use of ferroin indicator in redox titration of Mohr's salt?
Ferroin indicator is used in the redox titration of Mohr's salt as it changes color when the Fe2+ ions are completely oxidized to Fe3+ ions. This color change helps in determining the end point of the titration, where all the Mohr's salt has been oxidized and no more Fe2+ ions are present.
Why Mohr salt is called Mohr?
Mohr salt is named after the German chemist Karl Friedrich Mohr, who first synthesized it in 1855. He discovered the compound's chemical composition and properties that are frequently used in analytical chemistry and titration methods.
What are the uses of Mohr's salt?
Mohr's salt is primarily used as a reducing agent in various chemical reactions, such as in the laboratory synthesis of ammonia. It is also used in analytical chemistry for titration purposes, particularly in the determination of chloride ions. Additionally, Mohr's salt is employed in the production of pigments and dyes.
What is mohr's salt test?
Mohr's salt test is a chemical test used to detect the presence of chloride ions in a solution. It involves adding a silver nitrate solution to the sample, which forms a white precipitate of silver chloride if chloride ions are present. The formation of the precipitate confirms the presence of chloride ions in the solution.
Why we add conc sulphuric acid in mohr salt in the titration of mohr salt against potassium dichromate?
For preparation of standard solution of Mohr salt {FeSO4.(NH4)2SO4.6H2O}, it's necessary to add dilute H2SO4 to prevent the Fe2+ ions of Mohr salt solution from undergoing oxidation (to Fe3+).
Why does a colour change takes place while titrating mohr's salt against potassium dichromate?
From orange to (yellowish) green: It is a powerfull oxidant, used to titrate Fe2+ from Mohr's salt to the oxidised form Fe3+ by the following: Cr2O72−(aq) + 14H+ + 6e− → 2Cr3+(aq) + 7H2O
What is the equivalent weight of mohr's salt in the titration of pottasium permanganate and mohr's salt?
The equivalent weight of Mohr's salt (ammonium iron(II) sulfate) is the molecular weight divided by the total positive charge of the cation(s) that are being titrated. In the titration of potassium permanganate with Mohr's salt, the equivalent weight of Mohr's salt is 88 g/mol (molecular weight) divided by the total positive charge of the cation(s) (in this case, 2), which equals 44 g/equivalent.
Is potassium bromate a base?
Potassium dichromate (K2Cr2O7) is a basic salt.
What is the use of ferroin indicator in redox titration of Mohr's salt?
Ferroin indicator is used in the redox titration of Mohr's salt as it changes color when the Fe2+ ions are completely oxidized to Fe3+ ions. This color change helps in determining the end point of the titration, where all the Mohr's salt has been oxidized and no more Fe2+ ions are present.
Why Mohr salt is called Mohr?
Mohr salt is named after the German chemist Karl Friedrich Mohr, who first synthesized it in 1855. He discovered the compound's chemical composition and properties that are frequently used in analytical chemistry and titration methods.
What are the uses of Mohr's salt?
Mohr's salt is primarily used as a reducing agent in various chemical reactions, such as in the laboratory synthesis of ammonia. It is also used in analytical chemistry for titration purposes, particularly in the determination of chloride ions. Additionally, Mohr's salt is employed in the production of pigments and dyes.
What is principle of potassium dichromate in COD estimation?
The titer volume of the sample gives the volume of Ferrous Ammonium Sulphate required to react with the excess potassium dichromate in the solution. Similarly, the titer volume for the blank (distilled water) gives the volume of Ferrous Ammonium Sulphate required to react with the excess potassium dichromate in the blank. The equation for the titration can be expressed as: Cr2O72 -- + FeSO4 (NH4)2SO4 = Cr+ + NH4+ + Fe 3+ From above equation it can be seen that one molecule of dichromate corresponds to one molecule of Mohr's salt. Thus, the difference in volume of excess K2Cr2O7 reacting with Mohr's solution can be calculated from the expression: = (Original vol. K2Cr2O7 -- vol. of K2Cr2O7 used for oxidation) solution - (Original vol. K2Cr2O7 -- vol. of K2Cr2O7 used for oxidation) blank = (Vol. of K2Cr2O7 used for oxidation) blank - Vol. of K2Cr2O7 used for oxidation) solution Hence, the difference in the titer volume for the solution and the blank is used to find out the Chemical Oxygen Demand directly.
Where can you buy Mohr salt?
At the Mohr Salt shop.
Which indicator is used while titrating mohrs salt against potassium dichromate using internal indicator analysis?
ferroin indicator
Examples of salt?
Examples: sodium chloride, uranyl nitrate, potassium sorbate, lithium oxalate, silver chloride, ammonium phosphate, lithium fluoride, potassium dichromate etc.
What is mohr's salt test?
Mohr's salt test is a chemical test used to detect the presence of chloride ions in a solution. It involves adding a silver nitrate solution to the sample, which forms a white precipitate of silver chloride if chloride ions are present. The formation of the precipitate confirms the presence of chloride ions in the solution.
