When orange solution containing `Cr_(2)O_(7)^(2-)` ion is treated with an alkali, a yellow solution is formed and when `H^(+)` ions are added to yello

Question

When orange solution containing `Cr_(2)O_(7)^(2-)` ion is treated with an alkali, a yellow solution is formed and when `H^(+)` ions are added to yello

When orange solution containing `Cr_(2)O_(7)^(2-)` ion is treated with an alkali, a yellow solution is formed and when `H^(+)` ions are added to yellow solution, an orange solution is obtained. Explain why does this happen?

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

When orange solution containing `Cr_(2)O_(7)^(2-)` ion is treated with an alkali, a yellow solution of `CrO_(4)^(2-)` is obtained. On the same way, `undersetunderset(("orange"))("Dischromate")(Cr_(2)O_(7)^(2-))underset(H^(+))overset(OH^(-))rarrundersetunderset(("yellow"))("Chromate")(CrO_(4)^(2-))`
when `H^(+)` ions are added to yellow solution, an orange solution is obtained due to interconversion.