The Effect of Concentration on Absorbance Background Information The purpose of the “Determining Solution ‘Concentration’ Using A Spectrophotometer” lab was to use a spectrophotometer to find the relationship of concentration and absorbance obeying the Beer-Lambert law‚ which states concentration and absorbance are directly related‚ to then further determine the concentration of three unknown solutions. With the assumption that the solutions obey the Beer-Lambert law it is predicted that as concentration
Premium Chemistry Spectroscopy Light
TOMS SHOES BUSINESS STRATEGIES 2012 Formal Report Prepared by Natali Levi COMM 103 Nicholas Bredie 13.30 Report Distributed April 25‚ 2012 TABLE OF CONTENTS EXECUTIVE SUMMARY…………………………………………………………….3 INTRODUCTION………………………………………………………………………4 Background…………………………………………………………………..4 Purpose………………………………………………………………………...4 Scope………………………………………………………………………........4 RESEARCH & FINDINGS……………………………………………
Premium Social responsibility Strategic management Corporate social responsibility
Titration Lab Introduction The purpose of this lab is reach and be able to calculate the equivalence point when we use titration to neutralize a base with acid. The process of the lab was determining the volume of a solution needed to react with a given mass or volume of a sample is called titration. The equivalence point is when the same number of moles of acid and moles of base has been added. Phenolphthalein is used as an indicator because it will have a color change when the equivalence point has
Premium Titration Base PH indicator
The purpose of this experiment was to determine the weight percentage of copper in brass. This was achieved by performing a redox titration known as iodometry. Copper‚ which was obtained from the brass‚ was used to react with iodide to produce iodine. Iodine was then titrated with thiosulfate. In this experiment‚ the amount of titrant dispensed correlates with the amount of copper; therefore‚ the amount of copper in brass was calculated by using the data recorded. In this experiment‚ the analyte
Premium Oxygen Chemistry Hydrogen
you need‚ stoichiometry will let you find the limiting reactants and the excess reactants. The limiting reactant is the reactant that limits the amount of product formed in the chemical reaction. Also‚ you may find the percent yield by dividing the expected yield‚ the amount of product that should be produced based on your stoichiometric calculations‚ by the actual yield‚ the amount of product that is experimentally obtained from a chemical reaction. In this lab‚ I have determined the reaction for
Premium Stoichiometry Chemical reaction
| 87-89.9 | B+ | 83-86.9 | B | 80-82.9 | B- | 77-79.9 | C+ | 73-76.9 | C | 70-72.9 | C- | 67-69.9 | D+ | 63-66.9 | D | 60-62.9 | D- | 0-59.9 | F | B. Calculate the total lab points earned for the first student in cell T8 in the Grades worksheet. The first student earned 93 lab points. C. Calculate the average of the two midterm tests for the first student in cell W8. The student’s average midterm test average is 87. D. Calculate the assignment average for the first student
Premium Weighted mean Grade Decimal
The first flask was placed under a buret. Finally we titrated the KHP by adding the base until the end point was reached‚ which was when it turned pink completely. We repeated this twice and then cleaned up. The procedure does not include very difficult math‚ however the calculations did. The harder math calculations included finding moles of the acid‚ moles of the base that was used to neutralize‚ and the molarity of the base. After all calculations‚ below is what we concluded. The molarity you
Premium Sodium hydroxide Water Base
Planarian Lab Report Hanna Klein Bishop Fenwick High School Planarian Lab Report Introduction Planarian worms are free-living flatworms that are not parasitic. Planarians have a three-cavity digestive system. Planarians are usually either carnivorous or scavengers. Planarians may eat other living‚ as well as dead‚ invertebrates‚ detritus or decaying organic matter. Planarians do not realize that are eating a lot‚ and can over eat resulting in death. Most planarians are freshwater forms that can
Premium Flatworm Digestion Petri dish
(2) being able to apply that understanding of the microbial world so that the benefits to the Earth and humans are known(6). This lab specifically does not require the knowledge of what each organism does when introduced to another living organism‚ like a human. Figuring out the type of bacteria could help with further experiments. The idea of the unknown bacteria lab is to show
Premium Bacteria Microorganism Organism
In contrast‚ a parallel circuit is a circuit in which the has more than one resistor and has multiple paths to move along. The main purpose of this lab was to prove the laws of Ohm and Kirchhoff. On another note‚ being able to take part in this lab taught my partner and I the fundamental skills of constructing series and parallel circuit and using a multimeter to calculate the current and voltage of a circuit. I believe that if we only have the basic materials to conduct electricity (such as resistors
Premium Resistor Electric current Electrical resistance