Experiment 3. Separation of the Components of a Mixture

A.Determination of Mass Percent of Ammonium Chloride
Mass of evaporating dish and original sample _________
Mass of evaporating dish     _________
Mass of evaporating dish after subliming NH4Cl ________
Mass of NH4Cl   _______
Percent of NH4Cl (show calculations)
Use these data
  A.Determination of Mass Percent of Ammonium Chloride
Mass of evaporating dish and original sample 15.1650 g
Mass of evaporating dish     12.5230 g
Mass of evaporating dish after subliming NH4Cl 14.6589g
Mass of NH4Cl   _______
Percent of NH4Cl (show calculations)

. Determination of Mass Percent of Sodium Chloride

Mass of evaporating dish, watch glass and NaCl _____
Mass of evaporating dish and watch glass _____
Mass of NaCl _____
Percent of NaCl (show calculations) _____
Use these data

Determination of Mass Percent of Sodium Chloride

Mass of evaporating dish, watch glass and NaCl 17.4967 g
Mass of evaporating dish and watch glass 16.7686 g
Mass of NaCl _____
Percent of NaCl (show calculations)

. Determination of Mass Percent of Silicon Dioxide
Mass of evaporating dish and SiO2 _____
Mass of evaporating dish _____
Mass of SiO2 _____
Mass percent of SiO2 (show calculations) _____

. Determination of Mass Percent of Silicon Dioxide
Mass of evaporating dish and SiO2 13.8354 g
Mass of evaporating dish 12.5230 g
Mass of SiO2 _____
Mass percent of SiO2 (show calculations) _____

. Determination of Percent Recovery
Mass of original sample _____
Mass of determined (NH4Cl + NaCl + SiO2) _____
Difference in these weights _____
Percent recovery = g matter recovered/g original sample x 100%
_____
Account for your errors

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