Question

Which pair of compounds could be used in the preparation of calcium sulfate?

A calcium carbonate and sodium sulfate

B calcium chloride and ammonium sulfate

C calcium hydroxide and barium sulfate

D calcium nitrate and lead(II) sulfate ​

Answer 1

Answer:

You can do exactly the same preparation using potassium sulfate and calcium nitrate or calcium chloride, basically any solutions of a soluble calcium salt and a soluble sulfate salt can be used to prepare and precipitate calcium sulfate.

Explanation:

i hope this answer is right

Answer 2

Answer:B

Check solubilities.In option A, calcium carbonate is insoluble; in C,barium sulphate is insoluble; in D, lead sulphate is insoluble.But in B, both are soluble to react together to form a soluble salt :)