Bio 104-03 Lab #3- Acids Bases‚ and Buffers 1. An acid is a substance that releases hydrogen ions as they desolve in water and ranks lower than seven on the pH scale. An example of an acidic substance is lemon juice. A base is a substance that accepts hydrogen ions and ranks higher than seven on the pH scale. An example of a base substance is hand soap. A neutral substance ranks a seven on the pH scale and has equal concentrations of H+ and OH-. An example of this is pure water. Electrolytes
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Conclusion: The purpose of this lab was to synthesize and purify aspirin. The theoretical yield was calculated to 3.766g. The actual yield of pure aspirin was 2.863g with a yield of 76%. The percent yield indicates that our synthesis was a success but the yield is low and indicates that some of the aspirin was lost during synthesis. Some reasons for loss can result from human error such as loosing product from sticking on the spatula and the Buchner funnel and several weighings. Also‚ when transferring
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CURRICULUM VITAE Pardon Magaba 4194 Kuwadzana 5 Kuwadzana Harare 0772 804 562 pardonmagaba@gmail.com Clean Class 4 driver’s licence (61205HC) WORK EXPERIENCE Amizdam College Computer Lab Technician/ IT Tutor August 2012 to date Hayah Technology Computer Assistant Technician January 2012 – June 2012 ➢ Computer maintenance ➢ Installation and support of signage link software for multimedia University of Zimbabwe – Computer Centre IT Technician May 2010 – Jan 2012 ➢
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CJ Tavner 2/04/2013 Chemistry Lab: Equilibrium and LeChatelier’s Princinple Objective: Put stresses on the systems; observe how the equilibrium’s systems react to a stress. Materials and Procedures: A. Materials 1. NaCl(s) 2. KSCN‚ 0.002M 3. Bromythymol blue indicator solution 4. AgNO3‚ 0.1 5. CoCL2 x 6H2O(s) 6. HCl‚ 12M 7. HCL‚ 0.1M 8. NaOH‚ 0.1M 9. Fe(NO3)3‚ 0.2M 10. C2H5OH(l) 11. Na2HPO4(s) 12.
Free Hydrochloric acid Sodium chloride Hydrogen
The purpose of this lab was to see which solutions are soluble and which are not. We were able to see this by mixing certain solutions together and observing changes that occurred. The procedure for this experiment included a few different steps. The first steps were to add the nitrate solutions into the lettered parts of the 96-well plate. Once you were done with that‚ you were supposed to add the sodium solutions to the numbered parts of the 96-well plate‚ so that the solutions were added together
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Ammonia and Hydrochloric Acid Lab Chemistry 1 Abstract The straw should be cut shorter to 8 cm in order to make the solid ring appear in the center of the straw. We achieved our goal‚ cutting the straw caused the gases to not have to go as far‚ and meet in the middle. Background The particles in a gas are very loose and tend to move around a lot very quickly. The particles in a solid are very compact and vibrate but don’t really move very much. The particles in a liquid however are more
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Exercise 1: Cell Transport Mechanisms and Permeability: Activity 2: Simulated Facilitated Diffusion Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Molecules need a carrier protein to help them move across a membrane because Your answer : a. they are not lipid soluble. Correct answer: d. they are lipid insoluble or they are too large. 2. Which of the following is true of facilitated diffusion? You correctly answered: c. Movement is passive and down
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Lab Report: Halogen Reactions Purpose: This experiment will allow for exploration into some of the properties of Group 17 elements (halogens) and their compounds. More specifically‚ the solubility properties of these halogens will be used to predict their reactions. The relative electronegativities of the halogens will be determined. Halides‚such as Cl-‚ Br-‚ and I- will be used to make these determinations. Because this lab is qualitative rather than quantitative‚ there are no calculation
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I. Background of AT&T Corporation: The History AT&T Corporation can trace its root to the American Telephone and Telegraph Company. The original company was founded in 1885 by American Bell to create a network of long-distance communication nationwide with a commercially viable cost-structure. In 1899‚ the company in turn acquired the assets of American Bell in order to bypass Massachusetts corporate law that limited the capitalizations of corporations. By 1915‚ long distance telephone
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Booker T. Washington Born as Booker Taliaferro on April 5‚ 1856 to a slave named Jane and her white master‚ Booker T. Washington grew to become a prominent African American educator‚ author‚ and author‚ as well as advisor to Republican presidents (Wiki). He was considered the most significant black educator due to his control over the flow of funds to black schools and universities (Wormser). After the Emancipation Proclamation led them to be freed‚ Jane moved her family to rejoin her husband in
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