Lab 5 Acid/Base Extractions
Lab 5 Acid/Base Extractions
Introduction
The purpose of this experiment is to separate either the organic base (amine) or organic acid (carboxylic acid) from a mixture that contains inorganic impurities (salt) by performing a liquid-liquid extraction and then taking a melting point.
Key Experimental Details and Observations Our starting material, Compound B, was a fine white powder and weighed 0.535g. The final product was a shiny white sheet that resembled acrylic paint and weighed 0.109g.
Results
Final Weight Name | Solid Weight 1 | Solid Weight 2 | Solid Weight 3 | Weight | 0.110g | 0.109g | 0.109g |
Melting Point Name | Benzoic Acid Literature | 4-Amino acetophenoneLiterature | Ethyl AcetateLiterature | Solid Trial 1 | Solid Trial 2 | Solid Trial 3 | Melting Point | 121.0-123.0°C | 103.0-107.0°C | 83.2-84.8°C | 110.8-113.6°C | 111.1-113.1°C | 113.5-114.0°C |
Our percent yield was 0.109g/0.535g x 100 = 20.4%.
Discussion and Conclusions The melting point ranges we got for compound B ranged from 110.8-114.0 °C, while the melting point range for benzoic acid is 121.0-123.0°C and 103.0-107.0°C for 4-amino acetophenone. Since the ranges we acquired for compound B are directly in between both acid and base melting points, we can conclude that the purity for compound B is relatively high due to the compound being made up of equal parts of benzoic acid and 4-amino acetophenone. Thus saying that our melting point ranges are fairly accurate because they exemplify an equal percentage of both compounds, which is exactly what compound B is made up of. The purity can also be concluded through the melting points depression because depression arises from impurities within the lattice of a crystalized sample. We acquired a percent yield of 20.4%, which is relatively low. This result could be from part of the compound B solution being left behind in the Erlenmeyer flask when pouring the solution into the vacuum filtrate. The efficiency of a
Introduction
The purpose of this experiment is to separate either the organic base (amine) or organic acid (carboxylic acid) from a mixture that contains inorganic impurities (salt) by performing a liquid-liquid extraction and then taking a melting point.
Key Experimental Details and Observations Our starting material, Compound B, was a fine white powder and weighed 0.535g. The final product was a shiny white sheet that resembled acrylic paint and weighed 0.109g.
Results
Final Weight Name | Solid Weight 1 | Solid Weight 2 | Solid Weight 3 | Weight | 0.110g | 0.109g | 0.109g |
Melting Point Name | Benzoic Acid Literature | 4-Amino acetophenoneLiterature | Ethyl AcetateLiterature | Solid Trial 1 | Solid Trial 2 | Solid Trial 3 | Melting Point | 121.0-123.0°C | 103.0-107.0°C | 83.2-84.8°C | 110.8-113.6°C | 111.1-113.1°C | 113.5-114.0°C |
Our percent yield was 0.109g/0.535g x 100 = 20.4%.
Discussion and Conclusions The melting point ranges we got for compound B ranged from 110.8-114.0 °C, while the melting point range for benzoic acid is 121.0-123.0°C and 103.0-107.0°C for 4-amino acetophenone. Since the ranges we acquired for compound B are directly in between both acid and base melting points, we can conclude that the purity for compound B is relatively high due to the compound being made up of equal parts of benzoic acid and 4-amino acetophenone. Thus saying that our melting point ranges are fairly accurate because they exemplify an equal percentage of both compounds, which is exactly what compound B is made up of. The purity can also be concluded through the melting points depression because depression arises from impurities within the lattice of a crystalized sample. We acquired a percent yield of 20.4%, which is relatively low. This result could be from part of the compound B solution being left behind in the Erlenmeyer flask when pouring the solution into the vacuum filtrate. The efficiency of a