Lab Report # 11 By: Andrew Hoitt CHEM 105 Lab 11/29/2012 Lab # 11 – Acid - Base Titration Introduction: The purpose of this lab is to determine the molarity (M) of an unknown HCl solution. A NaOH solution will be made and its molarity calculated. A sample of the NaOH solution will be titrated against the unknown HCl solution to calculated the volume needed to neutralize it. With these volumes the unknown molarity can be calculated. Theory: Solutions
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Titration is a method used to help determine the concentration of an unknown solution (the analyte) by using a solution of known concentration (the titrant).1 In medicine‚ titration helps doctors determine unknown concentrations of substances in the blood or urine‚ and it is useful in determining the proper dosage of medication. Titration can determine fat and water contents‚ and unknown concentrations of vitamins. With food‚ titration can be used to determine whether cheese or wine is adequately
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Case Study Report for Unknown #49 A new school for girls was opened in a larger village in Northern Pakistan‚ and the teachers were proud to have convinced many families in the surrounding villages to allow their daughters a basic education. The school was a success‚ and the 6-10 year olds girls quickly learned how to read and write and were even instructed in the sciences. However‚ 2 weeks before summer break‚ many of the girls and the teacher developed breathing problems that included severe coughing
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of satire lies in The Unknown Citizen by W. H. Auden. It is a dark satire about what can possibly happen if political and bureaucratic principles corrode the creative and revolutionary spirit of the individual. This poem ridicules the fact that government‚ or the people in control of the citizens of the US‚ know‚ or could find out anything and everything about a person. This creates the idea that people are reduced to a number‚ or a statistic‚ not a person. In The Unknown Citizen‚ the State or the
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Rule 1: Life is not fair – get used to it! Rule 2: The world won’t care about your self-esteem. The world will expect you to accomplish something BEFORE you feel good about yourself. Rule 3: You will NOT make $60‚000 a year right out of high school. You won’t be a vice-president with a car phone until you earn both. Rule 4: If you think your teacher is tough‚ wait till you get a boss. Rule 5: Flipping burgers is not beneath your dignity. Your Grandparents had a different word for burger
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TRIPLE SUGAR-IRON AGAR TEST Triple sugar-iron (TSI) agar test- designed to differentiate among the different groups or genera of the Enterobacteriaceae‚ which are all gram-negative bacilli capable of fermenting glucose with the production of acid a. Differentiation is made on the basis of differences in carbohydrate fermentation patterns and hydrogen sulfide production. To facilitate observation of carbohydrate utilization patterns- TSI agar slants contain lactose and sucrose (1%) concentrations
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BIO 225 – Exam 2 Review Sheet Chapter 9 1. Know the anatomy of the structures that make up the prokaryotic cell. Know their functions. Know any clinical significance each structure might have and if it is a target for antibiotics. (On separate sheet) 2. Know the differences between Gram positive and Gram negative cell walls. * Gram positive cell wall * In addition to many layers of peptidoglycan‚ the cell wall of Gram-positive bacterials cells also contain: * Teichoic
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Anna Wright Mrs. Buckley AP English 20 February 2014 Achieving Success in the Face of the Unknown During World War II‚ one of the greatest thefts in history was occurring. Adolf Hitler was adamant about expanding his private art collection and filling it with the finest art of Europe. A group known as the Monuments Men worked to stop this by recovering and protecting these priceless artworks. Along their way‚ they came across numerous challenges they had to face and overcome. These encounters
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CONCLUSION After many class lab days‚ I concluded my unknown was Calcium Carbonate due to results from the Flame Test and Anion I Test. Throughout our lab days‚ my friends would help me determine various odors and colors of the substances which allowed me to confirm my answer. Also‚ I looked select test results up on the internet to see if they matched my observations. On our first lab day‚ I received my bottle and noticed a white precipitate in the bottom therefore‚ my unknown was insoluble. I started
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Discussion The four experimental techniques used in this proposal was aimed to complete the goal of answering questions about the system of three unknown red solutions. Based on the experiments conducted and the data collected‚ I am able to conclude information about the three red solutions that will lead to a possible identity of each red solution. Starting with red solution #1‚ we are able to conclude that there are no nanoparticles in this solution and that is a molecular compound due to the fact
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