Separating A Mixture Of Compounds Lab Report

Separating a Mixture of Compounds
Exp. No. 2
April 8, 2014

I. Purpose
The purpose of this experiment is to separate three components; SiO₂, NaCl, and NH₄Cl through Sublimation, filtration and evaporation to determine the mass and mass percentage of each component.

II. Experimental Method
Equipment Chemicals
Evaporating Dish Powdered Mixture A
2 50ml beaker Water
Balance
Thermometer
Bunsen burner

III. Raw Data and Calculations

Mass of empty evaporating dish 76.00g Mass of evaporating dish + powder mixture sample 86.00g Mass of the sample 10.00g

Sublimation of Ammonium Chloride (NH Cl): Mass of evaporating dish and the remaining sample after sublimation 84.778g Mass of NH₄Cl in the sample 1.222g

Filtration of Sand (SiO):
Mass of empty beaker 85.00g Mass of beaker with the SiO₂ after decanting 91.158g Mass of the SiO₂ 6.158g

Sodium Chloride (NaCl) Content and Evaporation: Mass of NaCl of other components 2.62g Measured mass of NaCl after boiling away water 87.62g

Mass of NH₄Cl = mass of evaporating dish and remaining contents after sublimation – mass of evaporating dish plus the powder mixture sample 1.222g = 84.778g – 86.00g

Mass of SiO₂ = mass of beaker with SiO₂ after decanting – mass of empty beaker 6.158g = 91.158g – 85.00g Mass of NaCl = NH Cl + SiO – initial sample mass 2.62g = 1.222g + 6.158g = 7.38g – 10g

% difference = [(measured mass) – (mass by subtraction)] / (mass by subtraction) * 100% 3.24% = 87.62g -2.62g = 85.00g/2.62g * 100%

Mass Percentage = mass component / 10g sample * 100 NH₄Cl 1.222g / 10g * 100 = 12.22% SiO₂ 6.158g / 10g * 100 =