How to Make a Chromic Acid Cleaning Solution
- 1). Place a clean, glass liter beaker in a glass pan to prevent damage from accidental spills.
- 2). Wearing rubber gloves, put 20 g of powdered sodium dichromate into the liter glass beaker.
- 3). Mix in a small amount of water to form a paste, and stir thoroughly with a glass stirring rod.
- 4). Continue to stir the mixture while slowly adding 300 ml of concentrated sulfuric acid to the beaker.
- 5). Carefully pour the solution from the beaker into a glass bottle with a stopper on top.
Source...