_________ ___________ Grading: Q.# 1. 2. 3. 4. 5. 6. 7. Score (Max) __________ (60 pts) __________ (18 pts) __________ (17 pts) __________ (13 pts) __________ (18 pts) __________ (12 pts) __________ (12 pts) Total __________ (150) Chem. 121 Final Exam Fall 2010 Name_____________________________________ 1. (3 pts each) Please circle
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Ideal Gas Behavior Author: VanessaStoll Lab Partners: Janelle Vallejo Instructor: Nieves Montano Chem 151‚ Section 002G Date Work Performed: February 12‚ 2014 Date Report Submitted: February 20‚ 2014 Abstract: This paper reports a lab experiment done on the ideal gas law to determine differences in gas based upon their “R” constant difference to 0.082057. A total of seven gases were tested‚ which included‚ Ethanol‚ Hexane‚ Cyclohexane‚ Pentane‚ Ethyl Acetate‚ Butane and Acetone
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CHEM 120 (Fall 2011) 1. Test #1 (Version 001) Page 2 of 8 (0.5 marks) Elemental mercury‚ Hg(l)‚ has a density of 13.6 g mL−1 at 25°C. What is the volume of 4.25 grams of Hg(l)? A. B. C. D. E. 0.313 mL 3.20 mL 17.8 mL 57.8 mL none of the above 2. (0.5 marks) What is the mass of 0.45 mol S? Choose the closest value. A. B. C. D. E. 9.7 g 0.45 g 14 g 0.049 g 15 g 3. (0.5 marks) Balance the following equation using the smallest whole number coefficients. C5H10O5 + O2 → H2O + CO2 What
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Background Information and Research Paper chromatography uses selective adsorption on a strip of paper. It is used for separating and identifying mixtures that are or can be colored‚ especially pigments. This can also be used in secondary or primary colors in ink experiments. Is it used for Contaminants in rainwater‚ Analysis of narcotics‚ and Detection of substances in urine. Purpose • The purpose of this lab is to see the separation of dye on the candy. Data and Observations Marker Color
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Separation techniques LIQUID CHROMATOGRAPHY ‘THE ART OF SEPARATION’ CHROMATOGRAPHY – AN INTRODUCTION Chromatography is a technique through which a mixture of chemical components are separated‚ identified and determined accurately. This technique while provides a way for analytical separations‚ also useful for preparative techniques by which pure compounds can be obtained. Detector Signal Blue Compound Sample Injection + Mobile Phase Retention Time Red Compound It is i defined d fi d as a
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Name: Date: Graded Assignment Lab Report Answer the questions below. When you have finished‚ submit this assignment to your teacher by the due date for full credit. (5 points) Score 1. Which combinations of substances resulted in a chemical change? Answer: The potassium nitrate and the ammounuiam hydroxide had a chemical change. It started bubbling and getting really foggy. The calcium nitrate and ammonuiam hydroxide did nothing. It’s all clear still‚ but no chemical change. The copper nitrate
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Introduction Methyl Salicylate has been used for a long time for its pleasant odour and flavour. The objective of this experiment was to carry an organic synthesis; the preparation of salicylic acid from methyl salicylate. To do an organic synthesis‚ it is needed to chemically modify the molecules of another compound to end up with the desire compound. Methyl salicylate is the major constituent of wintergreen oil‚ which is why it was used in this experiment as the starting material. The new technique
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How to do a Deadly EEI in Chemistry Students: These are some hints about the requirements of a high quality Extended Experimental Investigation for the Queensland Senior Chemistry Syllabus. Guidelines given to you by your teacher should take precedence if there is any doubt. They are addressing a Year 12 EEI but will still guide you for Year 11. They refer to a hypothesis-testing EEI. What’s the purpose of an EEI? You‟ll do an EEI to research a question you have about some chemistry-related phenomena
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Chem 1212L-345 Lab report Experiment #20: Temperature Change and equilibrium Woochul Jin Jeeyoon Kong‚ Alla Asmerom Hagos 03/22/2011 Woochul Jin Chem 1212L-345 Experiment #20 Lab Report Temperature change and equilibrium Introduction: In this experiment‚ we will find out how the variation of the value of an equilibrium constant with temperature can be used to determine the enthalpy (heat)‚ entropy (randomness)‚ and free energy (G) changes associated with the system in question
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CHEM RESEARCH TASK 1. INDICATORS Identify and describe some everyday uses of indicators including the testing of soil acidity/basicity. • Indicators are used regularly in chemical laboratories during chemical reactions. One important use is to determine the end point of a titration when an acid reacts with an alkali. The reactants and products of such a reaction are colourless so an indicator is a useful way to visually determine when the reaction is complete. Chemists also need to monitor
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