Syallubus for CHEM 1301 General Chemistry I Fall 2011 SCIE 2.106‚ M‚W: 2:35-3:50 Instructor Name: Dr. J. G. Parsons Email: parsonsjg@utpa.edu Office: Science room number: 3.348 Phone: Office : 381-7462 Office Hours: M/W: 1:30-2:30 or by appointment CRN: 12626 REQUIRED MATERIALS: Text Book: Chemistry by Julia Burdge (ISBN 978-0-07-302554-4) Scientific calculator (ARIS software package Required) RECOMMENDED MATERIALS: Burdge study guide Blackboard web course and a UTPA email address. CREDIT: Lecture
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variable represents the length of the string and the dependent variable represents the period of one oscillation. The control variable is the mass of the pendulum. In this lab our goal was to see if we can prove if the acceleration due to gravity is 9.8m/s2. The R2 in this lab is closed to 9.8 m/s2 . The formula that we used in this lab is T=2πLg and then we solved for g=L(T2π)2. HYPOTHESIS: The gravity will be 9.81 m/s2 at sea level due to the acceleration. PROCEDURE: Materials: stopwatch‚ meter
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The purpose of the first part of the experiment was to produce a chemical compound which was the alum crystals by using aluminum‚ potassium hydroxide and sulfuric acid. After the compound was present‚ the purpose of the second part of the experiment was to make sure that the compound that was formed in the first half of the experiment was actually alum. Some of the experimental techniques that were used in this experiment was filtration using the Büchner funnel vacuum filtration‚ recrystallization
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CHM130 Lab 4 Calorimetry Name: Data Table: (12 points) ALUMINUM METAL Pre-weighed Aluminum metal sample mass (mmetal) 20.09 g Temperature of boiling water and metal sample in the pot (Ti(metal)) dsdfa(Ti 99°C Temperature of cool water in the calorimeter prior to adding hot metal sample (Ti(water)) 24°C Maximum Temperature of water/metal in calorimeter after mixing (Tf) 28°C LEAD METAL Pre-weighed Lead metal sample mass (mmetal) 20.03g Temperature of boiling water and metal sample
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| 0.160 | 12 mL to 16 mL | 0.12 | 26 | 0.160 | 8 mL to 16 mL | 0.8 | 40 | 0.160 | 4 mL to 16 mL | 0.4 | 58 | 0.160 | 2 mL to 16 mL | 0.2 | 80 | Unknown | | | 56 | Conclusion By using a spectrophotometer with the unknown solution‚ a percent transmittance of 56 appeared. The concentration of the unknown solution was then easily plotted on a graph to show the corresponding data. Error Analysis -One of the 6 solutions of CO(NO3)2 could not have been rinsed out of the cuvette properly
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The Lab #4 Assessment Questions and Answers 1. What is a PHP Remote File Include (RFI) attack‚ and why are these prevalent in today’s Internet world? RFI stands for Remote File Inclusion that allows the attacker to upload a custom coded/malicious file on a website or server using a script. This vulnerability exploits the poor validation checks in websites and can eventually lead to code execution on server or code execution on website (XSS attack using javascript). RFI is a common vulnerability
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{Fe(SCN)}2+ “Knowns” Table 1: Solution Mixtures to determine Absorbance of {Fe(SCN)}2+ “Knowns.” Test Tube | Diluted Fe3+ (mL) | Stock 0.50 M KSCN (mL) | Stock of 0.1 M HNO3 (mL) | 1 | 1.0 | 5.0 | 4.0 | 2 | 2.0 | 5.0 | 3.0 | 3 | 3.0 | 5.0 | 2.0 | 4 | 4.0 | 5.0 | 1.0 | 5 | 5.0 | 5.0 | 0.0 | For Part B: Absorbance of {Fe(SCN)}2+ “Unknowns” Test Tube | Stock 0.0025 M Fe(NO3)3 (mL) | Stock of 0.0025 M KSCN (mL) | Stock of 0.1 M HNO3 (mL) | 6 | 1.0 | 1.0 | 5.0 | 7 | 1.0 | 1.5 | 4.5 | 8
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Gabi Mejia Chem 101 Section ADF Lab 4: Weak Acid Unknown Procedure: When testing the acid‚ use only between 0.2 g and 0.3 g for each trial (get as precise a measurement as you can). The general procedure is to weigh out your acid‚ dissolve it in water‚ add a couple drops of the indicator (phenolphthalein)‚ and then add the sodium hydroxide until you note a color change (from clear to pink). When the color change occurs‚ you have added enough base to completely react with the acid (the endpoint).
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Hypothesis 1: It was hypothesized that the growth and seed pod production in the standard plants would increase when less competitors were present and that growth would be more affected by competition than seed pod production would be. The data in Figure 1 and Figure 2 support this hypothesis; the standard plant grew the most when it was in a container alone and‚ on average‚ produced more seeds when no competitors were present (Figure 1). Though growth and seed pod production had similar trends
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Gauze mat Tongs Scoopula Materials: barium chloride (BaCl ) → hydrate crystals 2 Procedure: 1. First‚ preheat your evaporating dish on a hot plate for two to three minutes. Your dish should be clean and dry before use. 2. 3. 4. 5. 6. 7. 8. After your evaporating dish is heated‚ let it cool for at least three minutes. Use your tongs to move the dish to a suitable cooldown location. Once you dish has cooled down enough for touch put it on a scale. a. Find the mass to the nearest 0
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