Question

post lab questions

1. briefly describe the best method for separating each of the following mixtures (you may have to do a little research to find the answers):

a. sugar from a sugar - water solution
b. pure water from salty water
c. salt from salty water
d. clear water from muddy water
e. copper oxide from a suspension in water

Explanation:

a. Evaporation can be used as sugar is non - volatile and water will evaporate leaving sugar behind.
b. Distillation is suitable as salt has a much higher boiling point than water, and water can be vaporized and then condensed to get pure water.
c. Evaporation is the best method. Water will evaporate leaving salt crystals.
d. Filtration can be used as mud particles are insoluble and can be separated from water by passing the mixture through a filter.
e. Filtration is appropriate as copper oxide is insoluble in water and can be retained on a filter while water passes through.

Answer:

a. Evaporation
b. Distillation
c. Evaporation
d. Filtration
e. Filtration