During the chromyl chloride test for identifying chloride ions, a deep red vapor is evolved. What is — Qualitative and Quantitative Analysis Chemistry Question

💡 Solution & Explanation

The red vapors consist of chromyl chloride ($CrO_2Cl_2$). To find the oxidation state of chromium (let it be x), we set up the equation based on the oxidation states of oxygen (-2) and chlorine (-1): $x + 2(-2) + 2(-1) = 0$. Solving for x gives $x - 4 - 2 = 0$, thus $x = +6$.