In the numbered tubes sodium sulfate solutions, sodium chloride and sulfuric acid.

In the numbered tubes sodium sulfate solutions, sodium chloride and sulfuric acid. How to identify these substances? Write the reactions equations.

Two soles and acid are given in three tubes. Acids are capable of changing the color of the indicators. We lower in all the tubes a lactium paper. In the test tube with acid it will redden. In the remaining two tubes with the adhesive salts of the barium chloride, as it is a high-quality reagent for sulphate anions. As a result of the reaction in the sodium sulfate tube, a white precipitate of barium sulfate should fall out. In the test tube with sodium chloride, the reaction will not occur, so chloride barium and sodium chloride are salts of the same acid (chloride, or hydrogen).