In my organic lab, we synthesized synthetic banana oil. I'm asked what gas escaped during the sodium bicarbonate washing and to write two reactions that took place during that operation. I know carbon dioxide escaped but I don't know how to write out the formulas.
The rxn for CO2 is
CH3COOH + NaHCO3 ==> H2CO3 + CH3COONa
Then H2CO3 --> H2O + CO2
You're getting rid of the excess CH3COOH.
To determine the gas that escaped during the sodium bicarbonate washing in the synthesis of synthetic banana oil, you need to understand the chemical reaction that occurs when sodium bicarbonate reacts with the compound you produced.
During the washing process, water-soluble impurities are removed by the addition of sodium bicarbonate (NaHCO3) and water (H2O). Sodium bicarbonate reacts with any acidic impurities present in the synthetic banana oil to produce carbon dioxide (CO2) gas, water (H2O), and a corresponding salt.
Here are two possible reactions that might have occurred during the sodium bicarbonate washing operation:
1. Carboxylic Acid Reaction:
R-COOH + NaHCO3 → R-COONa + H2O + CO2
In this reaction, any carboxylic acid impurities (R-COOH) present in the synthetic banana oil would react with sodium bicarbonate to form a sodium carboxylate salt (R-COONa), water, and carbon dioxide gas.
2. Acidic Alcohol Reaction:
R-OH + NaHCO3 → R-O-Na+ + H2O + CO2
This reaction occurs if there are any acidic alcohols (R-OH) present in the synthetic banana oil. The reaction between the acidic alcohol and sodium bicarbonate results in the formation of a sodium alkoxide salt (R-O-Na+), water, and carbon dioxide gas.
Note: R represents a general organic compound structure.
Keep in mind that the specific reaction and the resulting gas may vary depending on the actual impurities present in your synthetic banana oil.
If you have access to the chemical structure or name of the compound you synthesized, you can provide more specific information, and I can guide you in writing the reaction equations for your specific compound.