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Why HCl is used in titration of mohr salt and potassium dichromate?
Wiki User
∙ 12y ago
so that ferrous doesnot get converted into ferric
Wiki User
∙ 12y ago
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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 mohr's salt test?
Chlorides will be dosed by titration with Silver nitrate (AgNO3) in the presence of potassium chromate (K2CrO4) as indicator. Salinity was expressed in mg NaCl/L of treated oil.
What compound will decolorize acidified potassium permanganate?
Mohr's salt
What is mohr salt?
Mohr Salt is Ammonium Iron (II) Sulphate, named after the German chemist Karl Friedrich Mohr.
Why Mohr salt is called Mohr?
Mohr salt is (NH4)2Fe(SO4)2·6H2O. This name was attributed in the honor of the German chemist Karl Fiedrich Mohr.
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+).
What is the equivalent weight of mohr's salt in the titration of pottasium permanganate and mohr's salt?
E Mohr salt 392/1
Is potassium bromate a base?
Potassium dichromate (K2Cr2O7) is a basic salt.
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 mohr's salt test?
Chlorides will be dosed by titration with Silver nitrate (AgNO3) in the presence of potassium chromate (K2CrO4) as indicator. Salinity was expressed in mg NaCl/L of treated oil.
What compound will decolorize acidified potassium permanganate?
Mohr's salt
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 salt?
Mohr Salt is Ammonium Iron (II) Sulphate, named after the German chemist Karl Friedrich Mohr.
Why Mohr salt is called Mohr?
Mohr salt is (NH4)2Fe(SO4)2·6H2O. This name was attributed in the honor of the German chemist Karl Fiedrich Mohr.
