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Essay Carboxylic Lab Report

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INTRODUCTION:

Carboxylic acids are organic acids characterized by the presence of a carboxyl group, -COOH. This acid acts as a weak acid, which can react with a strong base. Carboxylic acids form hydrogen bonds with many water molecules and are more soluble with one to four carbon atoms. Also, it may have an R group that consist of hydrogen or an alkyl group that changes its water solubility. Carboxylic acids with low molecular weight have odor at room temperature and higher molecular weight are solid and have low vapor pressure which have less molecules that allow us to smell it (Staudt 80).

When H in the carboxyl group is replaced with an alkyl group, it becomes an ester group. “The reaction typically gives 60-70% of the …show more content…

After the melted ester layer was recorded. The test tube was cool in an ice-water bath to room temperature and the odor was detected and recorded. Then, 6M HCl was added to the solution, but only 1 mL was added at a time until the solution turned acidic. The pH was tested each time. 3 times of 1mL 6M HCl was added for the solution to become acidic, which is a total of 3mL of 6M HCl. The solution and odor was examined.

DATA:

Carboxylic acids and their salts:

Characteristics of Acetic Acid Property | Water Solution | NaOH Solution | HCl Solution | Odor | Vinegar | Very light vinegar | Vinegar but not as intense as original | Solubility | Perfectly clear liquid solution | clear | clear | pH | 2 | 10 | 6 drops to get to pH of 5 |

Characteristics of Benzoic Acid Property | Water Solution | NaOH Solution | HCl Solution | Odor | Slight odor but not distinguishable | No odor | Slight odor but not distinguishable | Solubility | Not soluble | Soluble | soluble | pH | 3 | 10 | 13 drops to get to pH of 6 |

Esterification:

Test Tube | Acid | Odor | Alcohol | Odor | Name of Ester | Odor | 1 | Formic | Cannot distinguish the smell, but has strong vapor, burns the nose. | Isobutyl | Rub alcohol | Isopropyl formate | Raspberry | 2 | Acetic | Vinegar | Benzyl | No distinct odor | Benzyl acetate | Peach | 3 | Acetic | Vinegar | Isopentyl | Nail polish remover | Isopentyl acetate | Banana | 4 | Acetic | Vinegar | Ethyl | Rub Alcohol |

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