WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments
- Prepare water solution of hydrogen peroxide and sulfuric acid.
- Add a few drops of concentrated components to the flask with [200 ml] of water.
- Mix them carefully.
- Add some crystals of potassium dichromate to the solution.
- Observe the formation of blue clouds and oxygen bubbles.
- For the second part of the experiment we need to obtain chromil chloride. This part should be performed in a fume hood.
- Put some potassium dichromate and sodium chloride into the beaker.
- Add some concentrated sulfuric acid.
- The orange vapor of chromil chloride is produced.
- Take the flask with fresh water solution of hydrogen peroxide and sulfuric acid and pour the gas to it. Chromil chloride is more dense then air, so it can be poured out of the beaker easily.
- When orange vapor touches the solution surface it turns to blue clouds.