Written by Charisa Abstract The purpose of this lab is to identify the unknown salts using the change in temperature to calculate heat realeased. With the given “q” values for all three identiies of the unknowns, one can compare the calculated heat of the reaction to the given value to identify the salt. The unknowns chosen were unknown “C” for trials 1 and 2, and unknwon “A” for trials 3 and 4. The initial temperature was taken before the salt […]
Written by Charisa Abstract In this experiment, the properties of the reaction of poprocks and soda will be observed. Using a graduated cylinder and a tub of water, the amount of CO2 released can be measured based on the ideal gas law formula. The graduated cylinder will be filled with water then placed upside-down in the tub of water, so that the gas escapes into the measurable graduated cylinder. In addition, the energy released from the reaction will be calculated […]
Written by Brandon Purpose: The purpose of this experiment was to use an SN1 reaction mechanism to synthesize t-butyl chloride (Alkyl Halide) from t-butyl alcohol. Structures: Reaction Equation: Reaction Mechanism: Calculations: Mass of Main fraction = mass of Jar & sample – mass of jar; ex: 57.741-49.737=8.004 Percent Yield: (Actual/Theoretical)*100 ex: (8.004/14.72)*100 = 54.38% Results: Mass of 1oz. Jar: 49.737g Forerun Temperature: 40-44 Main Fraction Temperature: 44 Mass of jar and main fraction: 57.741g Mass of Main fraction: […]
Written by Robert Objective The purpose of this experiment was to analyze the purity of the benzoic acid, p-nitroaniline, and anthracene that were separated by pH-dependent extraction in the previous lab. Purity tests were done using Thin Layer Chromatogrphy (TLC) on a silica gel substrate. TLC is a technique used for separating a mixture of compounds. This is done by first dissolving the compound (assumed to be initially solid) in a solvent such as dichloromethane, and then using a Pasteur pipet […]
Written by Arturo Objectives: To determine the amount of iron in a vitamin tablet using visible spectrometry. Introduction Many compounds form colored solutions. Potassium permanganate solutions are purple, many copper(II) solutions are blue, and most nickel(II) solutions are green. If a solution is colored, a species within it is absorbing part of light in the visible region. A graph of absorbance, the amount of light absorbed by a species at different wavelengths is called an absorption spectrum. A similar graph may be […]
