Acid Impurity and Identification Through Molar Mass Calculation By Sena Contreras Introduction: The purpose of part I in the investigation was to determine if two methods of purifying succinic acid produce statistically similar results. We tested this using a pooled t-test; the null hypothesis being that there is no difference between the samples A and B. Sample A was purified by the first method, and sample B by the new method. The purity of each was found through an acid […]
Introduction The purpose of this experiment is to investigate the stereoselectivity of various reducing agents in the reduction of a carbonyl group. The first part of this experiment will focus on the stereoselectivity of sodium borohydride, lithium aluminum hydride, and lithium tri-sec-butylborohydride (L-selectride) in the reduction of 4-tert-butylcyclohexanone.1 The second part of this experiment will focus on the stereoselectivity of saccharomyces cerevisiae (baker’s yeast) in the reduction of ketone in ethyl acetoacetate.2 The stereoselectivity of each reducing agent will be […]
Written by Dan Jenkinson Introduction A ‘cage’ complex is a type of molecule, where a metal ion is encapsulated in a ligand and is unable to get out. The inability for the metal ion to get out of the cage complex also means that it is unable to get into it. As such, cage complexes often have to be assembled around the metal centre in situ. There are many examples in cage complexes, for example metals can become encapsulated within […]
Written by Brandon Ritter What does it mean to “work up” an organic reaction? Purpose: The purpose of this lab was to separate benzoic acid, 4-choloraniline and cholesterol using extraction. Reaction Equations: Missing 🙁 Structures: Calculations: Missing 🙁 Results: Benzoic Acid: Melting Point: 121.9-123.1⁰C Mass: 0.369g 4-chloroaniline: Melting Point: 68.6-70.2⁰C Mass: 0.043g Cholesterol: Melting Point: 146.7-147.2⁰C Mass: 0.205g Discussion: Our percent recovery for benzoic acid was really good, we got a lot more recovered benzoic acid product than expected. We got slightly […]
The absorption spectras of the five different solutions all differ in max wavelengths and ranges of wavelengths. The blue food coloring had one peak with a max absorption of .1201 at 630.7nm. The 1:1 mix of blue and yellow food coloring had two peaks with a max absorption of .1911 at 421.1nm. The yellow food coloring has one peak with a max absorbance of .3734 at 422.9nm. Type of Solution Color of Solution lmax values Blue Food Coloring Blue 630.7 […]
Written by Diane Krehbiel Abstract: In this experiment, two different methods were used to discover the acetic acid content in a sample of vinegar. The known percent of acetic acid in vinegar is 5%. The first method used was titrating with a visual indicator. The percent of acid found using this method was 5.086%. The second method was the use of pH meter to measure the change in pH. The percentage from using this method was 5.049%. The pH meter method […]