This constitutes a classic spot test for the alcohol functional group. But chromium compouds are very toxic. It is most reactive as hypochlorous acid, HOCl, so the reagent is used under acidic conditions. So you will test the solution for excess oxidizing agent using starch-iodide. Cyclododecanol is the reactant in this particular experiment.
Tips Be sure to review balancing of organic redox equations.
Secure flask to condenser with blue Keck clips. Use a magnetic stirrer immersed in a hot water bath at 45 C. Think carefully about which layer to keep and which layer to discard when doing the washing steps of the workup.