Question

In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is (+)_______.

Answer 1

The reaction is as follows:

$K_2\text{Cr}_2\text{O}_7 + 4\text{KCl} + 6\text{H}_2\text{SO}_4 \rightarrow 2\text{CrO}_2\text{Cl}_2 + 6\text{KHSO}_4 + 3\text{H}_2\text{O}$

This reaction is known as the chromyl chloride test. In this reaction, the oxidation state of chromium in $\text{CrO}_2\text{Cl}_2$ is $+6$.