Questions/D & F Block/Explain the colour c...
Potassium DichromateD & F Block

Explain the colour change when an acidic solution of Dichromate (Orange) is made alkaline.

Expert Answer

It turns Yellow due to the formation of Chromate ions ( CrO42CrO_4^{2-} ). Cr2O72OHCrO42Cr_2O_7^{2-} \xrightarrow{OH^-} CrO_4^{2-} .

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