Real Lab Procedure:
- Take 2ml of sodium sulphate solution in a test tube.
- Take 1ml of barium chloride solution in another test tube.
- Add barium chloride solution to sodium sulphate solution.
- Observe the change.
Simulator Procedure (as performed through the Online Labs)
- To pour barium chloride solution (BaCl2) into the test tube, drag the dropper towards it.
- To pour sodium sulphate solution (Na2SO4) into the same test tube, drag the dropper towards it.
- You can see that a white precipitate is formed in the test tube.
- See the inference by clicking on the inference icon.
- To see the zoomed view of the test tube, click on it.
- To go back to the previous screen, click on the ‘Back’ button.
- Drag the test tube towards the beaker to decant the upper solution into it.
- To pour dilute HCl into the test tube containing the white precipitate, drag the dropper towards it.
- After shaking, you can view the zoomed view of the test tube by clicking on it.
- To go back to the previous screen, click on the 'Back' button.
- You can see the inference by clicking on the inference icon.
- You can click the ‘Reset’ button to redo the experiment.
Note: Click on the ‘HELP’ button to see the instructions.
- A white precipitate appears that is insoluble in dilute HCl.
- When sodium sulphate chemically reacts with barium chloride in the form of their aqueous solutions, white precipitate of barium sulphate appears. This confirms the presence of sulphate (SO42-) ions.
- It is a double displacement reaction in which sulphate ions are displaced by chloride ions and chloride ions are displaced by sulphate ions.
- Use the chemicals judiciously.
- Keep the mouth of the test tube away from your face and also from other classmates.
- Handle the acids and alkali carefully.
So, try it out and “Have a safe lab!”