acts as a good oxidizing agent in acidic medium.
Orange Green
In alkaline solution, orange colour of changes to yellow colour due to formation of
and again yellow colour changes to orange colour on changing the solution to acidic medium.
Orange Yellow
Yellow Orange
and
exist in equilibrium at pH = 4 and are interconvertible by altering the pH of the solution. When heated with
and metal chloride,
gives vapours of chromyl chloride
Chromyl chloride (
when passed into aqueous
solution, yellow colour solution of
is obtained. This on reaction with lead acetate gives yellow ppt. of
When is added to an acidified solution of dichromate ion, a complicated reaction occurs. The products obtained depend on the pH and concentration of Cr.
A deep blue-violet colouredperoxo compound, , called chromic peroxide is formed. This decomposes rapidly in aqueous solution into
and oxygen.
What happens when a solution of potassium chromate is treated with an excess of dilute nitric acid? |
|
a) |
|
b) |
|
c) |
|
d) |
|
acts as a good oxidizing agent in acidic medium.
Orange Green
In alkaline solution, orange colour of changes to yellow colour due to formation of
and again yellow colour changes to orange colour on changing the solution to acidic medium.
Orange Yellow
Yellow Orange
and
exist in equilibrium at pH = 4 and are interconvertible by altering the pH of the solution. When heated with
and metal chloride,
gives vapours of chromyl chloride
Chromyl chloride (
when passed into aqueous
solution, yellow colour solution of
is obtained. This on reaction with lead acetate gives yellow ppt. of
When is added to an acidified solution of dichromate ion, a complicated reaction occurs. The products obtained depend on the pH and concentration of Cr.
A deep blue-violet colouredperoxo compound, , called chromic peroxide is formed. This decomposes rapidly in aqueous solution into
and oxygen.
What happens when a solution of potassium chromate is treated with an excess of dilute nitric acid? |
|
a) |
|
b) |
|
c) |
|
d) |
|