McLean 1 Creating Acetylene Gas Introduction The purpose of the lab was to determine the ratio of air to acetylene results in complete combustion of acetylene gas. The balanced chemical equation for this experiment was C2H2(g) + O2(g) --> CO2(g)+ H2O(l). Complete combustion is the reaction of an element or compound with oxygen to produce the most common oxides and energy. Complete combustion occurs when the fuel and oxygen combine in exact proportions to completely burn the fuel
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Procedure Access the virtual lab and complete the experiments. Part One (Flame Test): 1. Create and complete a data table for Part One of the lab. It should include the name of the element (or unknown) examined and the color of the observed flame: Barium-green Calcium-red Sodium-yellow Rubidium-purple Potassium-blue Lithium-pink 2. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did.: Unknown 1-yellow. I think it is Sodium because
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planting them in dry ground due to the risk of the moisture being taken out of the seeds instead of sticking with it to germinate‚ leaving the seed back to its original state. purpose - There are many factors that affect germination‚ however this lab will determine how moisture‚ specifically presoaking seeds will affect germination. To achieve the purpose of the experiment‚ one group of seeds will presoak for a required amount of time‚ for example‚ fifteen minutes to half an hour‚
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Lab 6.C Hypothesis: If enzyme activity is affected by the pH of a solution‚ then the enzymes will experience the greatest activity at a pH of 6. Variables: Independent Variables Dependent Variable Controls Four different pH values (10‚ 7‚ 6‚ and 3) Change in color of the solution The amount of potato extract‚ pH solution‚ and catechol used (1 cm +/- .1cm) Size of the test tubes Amount of time allowed for the catechol to sit with the potato extract and pH solution (20 minutes with 5
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BEAN LAB My hypothesis was the white beans would stand out but the black and green beans would be camouflage. For my prediction I said that if the predator consumes more white beans than black. Therefor‚ the white bean population will decrease. In the “beetles” environment the predominant colors are brown‚ green‚ black and tan; and the predominant colors for beans being brown‚ black‚ green and white. Knowing the predominant colors of the environment and of the “beetles” would show that the white
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BB 1704: COLLABORATIVE TECHNOLOGIES Academic Year: 2012-13 Semester: Spring Session: 1(a) Date: Thursday 31st January 2013 Title: Wikis ------------------------------------------------- ------------------------------------------------- Objectives: To gain an understanding of the wiki concept by examining wikis such as WikiWiki and Wikipedia. ------------------------------------------------- ------------------------------------------------- To compare different
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Earth the Moon the Sun Average distance of the Earth from the Sun Average distance of the Moon from the Earth Diameter of the Moon Diameter of the Sun g G e c k h h me mp mn k eo mo 9.8 m/s2 5 980 cm/s2 5 32.2 ft/s2 N-m2 6.67 3 10 211 kg2 1.60 3 10–19 C 3.0 3 108 m/s 5 3.0 3 1010 cm/s 5 1.86 3 105 mi/s 1.38 3 10–23 J/K 6.63 3 10–34 J-s 5 4.14 310–15 eV-s h/2π 5 1.05 3 10–34 J-s 5 6.58 3 10–16 eV-s 9.11 3 10–31 kg 5 5.49 × 10–4 u 4 0.511 MeV 1.673 3 10–27 kg 5 1.0078 u 4 938.3 MeV 1.675 3 10–27 kg
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Acids‚ Bases‚ and pH Lab In this lab the testing of whether or not a substance was an acid or a base occurred. Each substance was tested with the indicators red litmus paper‚ blue litmus paper‚ pH paper‚ phenolthalein‚ bromthymol blue‚ and phenol red. While the substances were tested the group noticed that the substances tested with the red and blue litmus paper‚ the phenolthatein‚ bronthmol blue were the easiest to interpret. The color changes that occurred when this indicator was put into a substance
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The purpose of this lab was to determine the concentration of NaCl or sodium chloride that is isotonic to elodea cells. First off‚ what is osmosis? Osmosis is this huge net of molecules moving through semi-permeable membrane to high concentration to direction where everything becomes balanced. This brings us to what osmolality is. Osmolality is related to osmosis and we know that osmosis has something to do with water so that being said‚ osmolality is number of osmoles of solute per liter in solution
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and also to prepare slides for observable bacteria culture from yogart. Procedure: Exercise 1: Using the Microscope - Viewing Prepared Slides I started out by reading and reviewed the science lab safety reinforcement Agreement and the instruction to oil immersion lens. After setting up my lab station I view the six prepared slides with 10x and 40x objctives lens. In each slide the differences was magnification and the 40x lans gave a clearer look of the specimen. The observation of slide e
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