Written by Hannah Purpose To measure the grams of yellow 5 dye in a sample (i.e. bottle of Minute Maid Lemonade), and to identify the cations present in sparklers using their emission spectra (Spectroscopy). Procedure Six standard solutions were made from the Yellow 6 stock solution. The first standard solution was made by adding 5.00 mL 6.550×10-5 M yellow 6 solution and 2.00 mL of distilled water to a test tube using a graduated pipet and by subsequently mixing […]
Written by Morgan I. Introduction: This experiment is concerned with determination of the concentration of a standard solution of HCl. Coulometric titrations are performed using MicroLab FS 522 with MicroLab Model 290 sensor adaptor module to gather data regarding electric current variability. The theories underlying this variety of titration include redox reactions, current and total charge, and the techniques of coulometric measurement of electrolysis can be found in the following materials1: D.C. Harris, Quantitative Chemical Analysis, 8th ed., W.H. Freeman, […]
Written by Robert Purpose: To use solvent extraction techniques to separate a mixture consisting of a carboxylic acid, a phenol, and a neutral compound and to determine the melting points of said chemicals. Description: For this experiment, we used the following materials: (4) 100 mL beakers, 400 mL beaker with ice, Buchner funnel, 125 mL Erlenmeyer Flask, 250 mL filter flask, filter paper, glass stirring rod, 25 mL graduated cylinder, hot plate, melting point capillary tubes, disposable pipets, pH test […]
Written by Danielle A mutation of the eyeless gene in Drosophila melanogaster changes the phenotype and is demonstrated to be located within intron 2 of the eyeless gene. Abstract: Drosopholia melanogaster flies are ideal for genetic study. This is due to the ability to observe mutation of the DNA through phenotypic manifestations. A mutation is an alteration in the DNA that may or may not alter gene expression within the organism containing the modified sequence. With use of D. melanogaster flies in genetic study, […]
Written by Juan Purpose: The purpose of this experiment was to determine the percentage of orange oil in an n-hexane unknown solution by analyzing the wt% of d-limonene through gas chromatography, using anisole as an internal standard. Sample Calculations Weight of Anisole in Standard #1 Weight of Limonene in Standard #1 Limonene: Anisole weight ratio in Standard #1 Limonene: Anisole peak area ratio in Standard #1 LLS Slope, intercept, and equation for internal […]
Written by Arturo I. ABSTRACT For experiment 13 Ballistic Pendulum, we used the conservation of momentum and mechanical energy to determine the velocity of a ball as it is shot from a launcher. The angle was measured every time the launcher was released for method A. For method B, we removed the pendulum bob and shot the ball off the table onto the floor, where we recorded the distance of the x axis from the table to the spot where […]
