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Why does a colour change takes place while titrating mohr's salt against potassium dichromate?
Wiki User
∙ 11y ago
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
Wiki User
∙ 11y ago
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Does carbon dioxide gas change acidified potassium dichromate solution green?
No
What is the equivalent weight of K2Cr2O7 fully explanation?
Equivalent weight of potassium dichromate = Molecular mass/6 = 294,185/6 = 49,0308
Is heating ammonium dichromate a chemical or physical change?
It is a chemical change because the ammonium dichromate changes color, explodes, and probably creates a gas during the change.
When does standardization become necessary?
some solvent are deliquiscent ,hydroscopicor even volatile e.g potassium dichromate undergoes photocatalysis in the open leading to change in concentration hence standardizaticn will be neccessary to determine constant concentration for accuracy durin analysis
How do you prepare 1 N potassium dichromate?
prepare a concentrated aqueous solution of di chromate and add solid KOH warm till orange colour change to yellow and then filter the solution the filtrate is allow to evaporate and get solid potassium chromate.
What colour change will occur when potassium dichromate reacts with ethanol?
Potassium dichromate is orange and when it reacts with ethanol which is a primary alcohol it is going to oxidise it to form aldehyde which is colorless. so the color change is from Orange to Colorless. :)
Does carbon dioxide gas change acidified potassium dichromate solution green?
No
What is the equivalent weight of K2Cr2O7 fully explanation?
Equivalent weight of potassium dichromate = Molecular mass/6 = 294,185/6 = 49,0308
Is heating ammonium dichromate a chemical or physical change?
It is a chemical change because the ammonium dichromate changes color, explodes, and probably creates a gas during the change.
When does standardization become necessary?
some solvent are deliquiscent ,hydroscopicor even volatile e.g potassium dichromate undergoes photocatalysis in the open leading to change in concentration hence standardizaticn will be neccessary to determine constant concentration for accuracy durin analysis
What change that observe?
by the burning of ammomium dichromate it gave a dark green colour
Is potassium a physical or chemical change?
Potassium is not a change; potassium (K) is a chemical element.
What do you look for when titrating an unkown base?
how much HCl of the same molarity it takes to change the color of your unknown base
Is burning ammonium dichromate a chemical or a physical change?
chemical because a new substance is formed
Potassium cholrate decomposes to potassium chloride and oxygen gas is it a chemical change?
It is a chemical change. 2KClO3 ----> 2KCl + 3O2
How do you prepare 1 N potassium dichromate?
prepare a concentrated aqueous solution of di chromate and add solid KOH warm till orange colour change to yellow and then filter the solution the filtrate is allow to evaporate and get solid potassium chromate.
What chemical's solubility is most affected by change in temperature potassium nitrate or salt?
Unlike salt, potassium nitrate's chemical solubility is most affected by a change in temperature. Potassium nitrate is a chemical compound.
