Determine which of the test tubes with solutions contains the salts: Iron (III) chloride, copper (II) chloride

Determine which of the test tubes with solutions contains the salts: Iron (III) chloride, copper (II) chloride, chromium (III) chloride.

All compounds are chlorides, which means they can be determined by cation. For this, we will conduct qualitative reactions.
Add an alkali, such as NaOH, to each tube.
We will observe the following:
In the test tube with CuCl2, a blue precipitate of Cu (OH) 2 will precipitate.
A brown, dark brown precipitate of Fe (OH) 3 will precipitate in a test tube with FeCl3
A dark green precipitate of Cr (OH) 3 will appear in the test tube with CrCl3