Procedures 1. What should you always wear to protect your eyes when you are in the chemistry laboratory? You should wear safety glasses to protect your eyes when you are in the chemistry laboratory. 2. Should you add acid to water or water to acid? You should always add acids to water. 3. Where should you dispose of broken glass? You should dispose broken glass in a protective container. 4. What should you do if you spill a chemical on your hand? If the chemical spill is on a small area you
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place each segment onto a plate. 6. Using your hands slowly dip the apple into each substance and place it on the plate in front of the cup with that substance in it. (Make sure your hands are cleaned after every apple) 7. Start the timer and every ten minutes rate the progression of discolouration on each apple on the scale listed below. Take photos. 8. Repeat experiment (steps 1-7) one more time using the remaining apple. 9. Record the results in the table. SCALE 0 - no browning present
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Some bacteria that are pathogens‚ such as Mycobacterium tuberculosis and Treponema pallidum‚ have especially long generation times‚ and this is thought to be an advantage in their virulence. Generation times for a few bacteria are are shown in Table 2. Table 2. Generation times for some common bacteria under optimal conditions of growth. |Bacterium |Medium |Generation Time (minutes) | |Escherichia coli
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Acid Rain Lab Report Introduction: The problem was to see how crushed chalk and whole chalk weather differently. The independent variables are The temperature of the liquids The surface area of the chalk‚ crushed vs whole The dependant variable was the weathering of the chalk; this was calculated by measuring the foam reactant. Procedure: Part B- For the two partners recording data with the room temperature liquids‚ the materials where collected first. Two of the graduated
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Freem an‚ Biological Science‚ 4e‚ Chapter 4 Chapter 4 - Nucleic Acids and the RNA World Learning Objectives: Students should be able to... • Sketch a nucleotide‚ label its three basic parts‚ and identify the 2’‚ 3’‚ and 5’ carbons. • Make another sketch showing the primary and secondary structures of DNA. • Describe the primary‚ secondary‚ tertiary‚ and quaternary structures of RNA‚ and explain in what ways RNA differs from DNA. • Explain why and how the secondary structure of DNA allows
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Paulina Milewska Kurt Jooss’ The Green Table Expressionism can be described as a movement in the fine arts that emphasized the expression of inner experience rather than realistic portrayal‚ looking to obtain not objective reality‚ but the subjective emotions and responses that objects and events arouse in the artist. Several characteristics of expressionism are distortion‚ exaggeration‚ primitivism‚ and fantasy. “The Green Table‚” a ballet by Kurt Jooss‚ 1932‚ is an ideal example of expressionism
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3 - December 10-11‚ 2012 1. The diagram below depicts a system of aqueducts that originate at three rivers (nodes R1‚ R2 and R3) and terminate at a major city (node T) where the other nodes are junction points in the system. Using units of thousands of acre feet‚ the tables below show the maximum amount of water that can be pumped through each aqueduct per day and the following diagram shows the network of the system. From/To A R1 75 R2 40 R3 B 65 50 80 C 60 70 From/To D A 60 B 70 C E 45 55 70 F
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Introduction: In this lab‚ we measured the acid-base strengths of seven separate organic compounds. The lab was painless to perform‚ it consisted of adding a small amount of one of the organic compounds to a well‚ and testing the pH via testing paper. The color of the paper was then analyzed to determine what the pH of the compound was. The structures were benzenesulfonic acid‚ benzoic acid‚ benzyl alcohol‚ benzylamine‚ p-cresol‚ and p-toluidine. My initial hypothesis about the acidity/basicity
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KINETICS OF THE ACID DECOMPOSITION OF THIOSULFATE Aqueous solutions of thiosulfate‚ S2O32-(aq) are stable if neutral or basic‚ but decompose quickly when the thiosulfate is dissolved in acid according to the equation: Sulfur dioxide is a gas at room temperature‚ but is very soluble in water. Sulfur‚ a water insoluble solid‚ forms a colloidal suspension. As a result‚ the solution first becomes cloudy and then opaque. We can take advantage of the developing opacity of the reaction system to do a
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Atausch July 28‚ 2014 Bio 102 Lab Final Exam: Acids and Enzymatic Reaction Purpose: To examine how an acidic fluid will modify the outcome of an enzymatic reaction. Introduction: Enzymes are “specialized proteins made by living cells that serve as biological catalysts.” (eScience Labs‚ LLC‚ 2013) These enzymes “allow certain industrial processes to be carried out at normal temperatures and pressures‚ thereby reducing the amount of energy and expensive equipment needed.”(BBC‚ 2012) Enzymatic
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