1) in this experiment, what property of nacl is used to separate it from the other two components? is this a chemical or physical property?
2) in this experiment, what property of caco3 is used to separate it from sio2? is this a chemical or physical property?
3) explain what the effect on the percentage of each component would be if the student did not fully dry the evaporating dish after step 7.
effect on salt:

effect on sand:

effect on chalk:

The anwsers to your questions are below

Explanation:

1.- It was used solubility in water to separate NaCl from the other to components. Solubility is a physical property because the substance does not transform into a different one.

2.-  Reactivity, it is a chemical property because CaCO3 transform into Co2 and CaCl2.

3.- I don't know which is step seven, but is a sample is not dry completely it will be polluted, it is not pure.

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;