Three flasks without labels contain solutions of sulfuric acid, sodium sulfate, sodium nitrate.

Three flasks without labels contain solutions of sulfuric acid, sodium sulfate, sodium nitrate. How to chemically identify substances?

First of all, it is necessary to determine which of the tubes contains sulfuric acid. To do this, we will use a blue litmus test. When interacting with sulfuric acid, the piece of paper turns red.
The next step is to identify sodium sulfate by adding barium chloride to the remaining two tubes. A characteristic white precipitate forms in the sodium sulfate flask. Accordingly, the third flask contains sodium nitrate.