Question

8. Как определить, что в пробирке присутствует сульфат натрия? Напишите уравнение реакции в молекулярном и ионном виде.​

Answer 1

Надо добавить гидроксид Бария
Na2SO4+ Ba(OH)2=2NaOH+BaSO4

Answer 2

Identifying the Presence of Sodium Sulfate in a Test Tube

To determine the presence of sodium sulfate in a test tube, you can perform a chemical reaction that results in a visible change. One common method is to add barium chloride solution to the test tube containing the unknown substance. If sodium sulfate is present, a white precipitate of barium sulfate will form.

Chemical Reaction in Molecular and Ionic Form

The chemical reaction between barium chloride and sodium sulfate can be represented in molecular and ionic forms as follows:

Molecular Equation: Barium chloride (BaCl2) + Sodium sulfate (Na2SO4) → Barium sulfate (BaSO4) + Sodium chloride (NaCl)

Ionic Equation: Ba^2+(aq) + 2Cl^-(aq) + 2Na^+(aq) + SO4^2-(aq) → BaSO4(s) + 2Na^+(aq) + 2Cl^-(aq)

This reaction results in the formation of a white precipitate of barium sulfate, indicating the presence of sulfate ions in the solution.

I hope this helps! If you have further questions or need additional information, feel free to ask.