Question

What compound becomes green and turns yellow with concentrated HCl

Answer 1

Question #55080 – Chemistry – Inorganic Chemistry

Question:

What compound becomes green and turns yellow with concentrated HCl?

It can be compounds of vanadium.

$$\mathrm{V_2O_5} + 6\mathrm{HCl} + 7\mathrm{H_2O} \rightarrow 2[\mathrm{VO}(\mathrm{H_2O})_5]^{2+} + 4\mathrm{Cl^-} + \mathrm{Cl_2}$$

This is redox reaction. Vanadium changed oxidation state. During this reaction colour of compound becomes green and turns yellow.

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