The molecular formula of citric acid is C 6 H 8 O 7. The chemical formula for citric acid is best shown by a diagram of its complete structural formula. This shows how the atoms are arranged in the molecule. Citric acid has three carboxyl or-COOH groups and is triprotic in nature.
In order to make tan you should mix white and brown. If you want to make the brown color yourself mix 2 parts of one primary color (like red) and 1 part of each of the other t â¦ wo (blue and yellow). The more white you use the lighter the shade of tan.
The bottom line is that to mix brown from a limited palette you need to mix the three primary colors. For a lighter shade of brown you can add white. I usually donât like to use black, because black flattens the paint too much, and in nature pure black hardly exists. However, you can use it to darken a color if you so want.