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

To separate a mixture of sodium chloride (NaCl) and calcium carbonate (CaCO3), the steps should be ordered such that each component is separated effectively. Let's break down the steps:

Add water to dissolve sodium chloride: Sodium chloride is soluble in water, so adding water will dissolve the NaCl, leaving the insoluble CaCO3 behind.
Filter the mixture: After dissolving the NaCl, the mixture can be filtered to separate the insoluble CaCO3 from the soluble NaCl solution. The solid CaCO3 will remain on the filter paper while the NaCl solution passes through.
Evaporate the water: Once the NaCl solution has been separated, the water can be evaporated from the solution, leaving behind solid NaCl.
So, the correct order of steps would be: D. 3, 1 then 2. This means you evaporate the water first, then dissolve the NaCl, and finally filter the mixture.