In the reaction of potassium dichromate, potassium chloride and sulfuric acid (conc.), the oxidation state of the chromium in the product is $(+)$ _________.
Answer (integer)
6
Solution
<p>$$\begin{aligned}
& \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7(\mathrm{~s})+4 \mathrm{KCl}(\mathrm{s})+6 \mathrm{H}_2 \mathrm{SO}_4 \text { (conc.) } \\
& \rightarrow 2 \mathrm{CrO}_2 \mathrm{Cl}_2(\mathrm{~g})+6 \mathrm{KHSO}_4+3 \mathrm{H}_2 \mathrm{O}
\end{aligned}$$</p>
<p>This reaction is called chromyl chloride test.</p>
<p>Here oxidation state of $\mathrm{Cr}$ is +6.</p>
About this question
Subject: Chemistry · Chapter: Redox Reactions · Topic: Oxidation States
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