Separating a Mixture of Compounds


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

Evaporating DishPowdered Mixture A
2 50ml beakerWater
Bunsen burner

III.Raw Data and Calculations

Mass of empty evaporating dish76.00g
Mass of evaporating dish + powder mixture sample86.00g
Mass of the sample10.00g

Sublimation of Ammonium Chloride (NH Cl):
Mass of evaporating dish and the remaining sample after sublimation 84.

Mass of NH₄Cl in the sample1.222g

Filtration of Sand (SiO):
Mass of empty beaker85.00g
Mass of beaker with the SiO₂ after decanting91.158g
Mass of the SiO₂6.158g

Sodium Chloride (NaCl) Content and Evaporation:
Mass of NaCl of other components2.62g
Measured mass of NaCl after boiling away water87.62g

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
NH₄Cl1.222g / 10g * 100 = 12.22%
SiO₂6.158g / 10g * 100 = 61.58%
NaCl2.62g / 10g * 100 = 26.2%


Component Mass Percentage
% NH₄Cl12.22%
% SiO₂61.58%
% NaCl26.2%

Based on the experimental results, the preferred method of separation is Sublimation of Ammonium Chloride (NH Cl) which calculated as the lowest mass percentage.

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Also proves that not all of the components can be separated through sublimation.

Updated: Jul 06, 2022
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Separating a Mixture of Compounds. (2016, Feb 26). Retrieved from

Separating a Mixture of Compounds essay
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