Question

While performing an experiment, a student adds sodium sulphate solution to a colourless solution. A white precipitate is immediately formed and is insoluble in dil. HCl. The colourless solution is …………………………… & the precipitate formed is……………………​

Answer 1

The colourless solution is Barium chloride and the precipitate formed is Barium sulphate.

• To solve this question, we must first note that when barium chloride is mixed with sodium sulphate solution, then a precipitate which is white in colour and forms immediately is barium sulphate which is insoluble in dilute HCl.
• Now, let us look at the reaction of the given situation which is as follows:
• BaCl2 + Na2SO4 → BaSO4 + 2NaCl