Illustrated Guide to Home Chemistry Experiments

96 DIY Science: Illustrated Guide to Home Chemistry Experiments

RQEWEvI UESTIOnS

q 1 : After this procedure, you should end up with separate piles of sand and sucrose with masses that are the same as the initial
masses. How closely do your experimental results correspond to the expected results? Propose an explanation for why the final
masses of the sand and/or sucrose might be higher or lower than the starting masses.

q: 2 You are mixing concrete, but the only sand available is heavily contaminated with salt, which weakens concrete. You have plenty
of water available, but no means of filtering. How might you remove the salt from the sand?

q: 3 You are presented with a mixture of two compounds, both of which are freely soluble in water. What might you do to separate
these compounds using differential solubility?

Item Mass

A. Sand, initial ________.___ g

B. Sucrose, initial ________.___ g

C. Filter paper ________.___ g

D. Second beaker ________.___ g

E. Filter paper + sand ________.___ g

F. Second beaker + sucrose________.___ g

G. Sand, final (E – C) ________.___ g

H. Sucrose, final (F – D) ________.___ g

TABLE 6-1: Differential solubility—observed and calculated data