Question

A mixture of sodium chloride and calcium carbonate is separated using the steps given. In which order should the steps be carried out?

• A. 1, 2 then 3
• B. 2, 1 then 3
• C. 1, 3 then 2
• D. 3, 1 then 2

Answer 1

The correct option is B 2, 1 then 3

First, we dissolve mixture, only $NaCl$ will dissolve and calcium carbonate forms precipitate.
Now, we filter this solution and calcium carbonate separates.
Then we use evaporation to separate $NaCl$ from the solution.