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  3. Chemistry
  4. The colour of potassium dichromate depends upon pH of solution. The chromate and dichromate are interconvertible in aqueous solution depending upon pH. In acidic pH, chromate ions get converted into ions whose colour is

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Q. The colour of potassium dichromate depends upon $pH$ of solution. The chromate and dichromate are interconvertible in aqueous solution depending upon $pH$. In acidic $pH$, chromate ions get converted into ions whose colour is

The d-and f-Block Elements

Solution:

In acidic medium chromate ion converts to dichromate ion as :

$\underset{\text { Yellow }}{2 CrO _{4}^{2-}}+2 H ^{+} \longrightarrow \underset{\text { Orange }}{ Cr _{2} O _{7}^{2-}}+ H _{2} O$