Question

Which of the following can be used to seperate the components of a mixture of Marbles and salt water? Select the BEST response.

At the end you will have marbles, water and salt (NaCl) fully purified from the mixture.



a
A and B
b
C only
c
D and then B
d
D only
e
B and then C

Answer 1

I don’t have the descriptions/images for A, B, C and D, so I can’t pick the numbered answer yet. Please paste the text or image that defines A–D.

Meanwhile, the correct method and reasoning:

- First remove the marbles by a mechanical separation you can do by hand/sieving/filtration/decanting (anything that separates large insoluble solids).
- Then separate salt and water by distillation (boil the salt water and condense the vapor). Distillation gives you both pure water (distillate) and the salt left as residue. Evaporation alone would give salt but you would lose the water.

So the best two-step sequence is: remove marbles, then distill the salt water. If in your choices B = “remove marbles” and C = “distillation,” then pick “B and then C.” If you post A–D I’ll choose the exact lettered option.