Nerissa Govender 209539579 CHEM 310 Experiment 1- Synthesis of Co (acac)3 Date of experiment performed: 03 August 2011 Date of hand in: 10 August 2011 Aim To prepare cobalt (III) acetylacetonate in the laboratory using cobalt (II) carbonate and acetylacetone at room temperature and pressure. Introduction The anion acetylacetone (acac) used in this practical functions as a ligand which forms a complex with the cobalt metal cation in an octahedral array where there is electrostatic bonds
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photon. When the energy level in the photon drops so that none of the band gaps cover it then it can either pass through and get absorbed by electrons further into the matter or it will be reflected back. Procedure Materials * Electric hotplate * Pipette / micro pipette * Conical Flask * Laser beam * Magnetic stirrer * Sodium Citrate * Stirring rod | * Wooden Peg * 10 ml Measuring cylinder * Curvette * Spectrophotometer * Gold Solution (HAuCl4) * Heat proof mat
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Organic Chemistry: CHP 225 Thomas Hsieh Experiment 2: Boiling Points o Date experiment was performed: September 16‚ 2011 o Objective: To determine the boiling point of organic compounds such as tert-butyl alcohol‚ sec-butyl alcohol‚ n-butyl alcohol‚ and an unknown. o Principle: Boiling point is the temperature at which gas and liquid phases coexist in equilibrium. At this temperature‚ the vaporization rate and the condensation rate are equal. The liquid and vapor reach a state of dynamic
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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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INTRODUCTION Whenever two objects with different initial temperatures are put in contact with each other‚ the warmer one will cool down‚ and the cooler one will warm up‚ until they reach the same temperature. We now know that this has to do with the motions of molecules: what we sense as temperature is related to the average kinetic energy of the molecules of each material: the faster they’re vibrating around‚ the hotter the object feels. We can sidestep this molecular picture by dealing with
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peroxide before pouring it into the beaker with the paper towel. Do the same for 3 drops of 3.5pH. Again use the same concentration mix with 1.5% H2O2 and repeat steps 1-8‚ but this time place the concentration on a hotplate set at two. Start timer as soon as its on the hotplate. Repeat again steps 1-8 but the mixture will be .3g yeast to 5 mL glucose‚ incubation time is the same. With this mixture test 30mL 1.5% H2O2 and 3%‚ separately. Record the time it
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Activities in this project include: focus group interviews; moreover‚ two fabric tests (Sweating Guarded Hotplate Test and Stain Resistance Test) conducted on fabric samples from eight scrub garments. In the focus group interviews‚ the ten or twelve participants will receive a $30 gift card (48 @ $30) for their participation. For the fabric test (Sweating Guarded Hotplate Test and Stain Resistance Test)‚ I need fabrics from eight scrub garments‚ current brands of scrubs. In addition‚ I
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find out the accurate mass of a solid and to calculate the moles of an unknown. Materials: The materials used in this experiment are Hydrated Copper (II) Sulfate‚ weighing bottle‚ analytical balance‚ laboratory balance‚ casserole‚ spatula‚ and hotplate. Methods: First‚ approximate 1.0g of hydrated copper (II) sulfate was transferred into a weighing bottle and the lid was screwed on. The colour of the solid was noted.The capped bottle was then taken into the analytical room and its mass was
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Week 1 Readings 1. Read course description‚ overview and learning outcomes. 2. Read Chapters 1‚ 2‚ 3‚ 4‚ and chapter supplements in your text. Study and review the key terms at the end of each chapter. Work as many problems as possible to understand the material. This is usually the best way to learn the course concepts. Discussions To participate in the following Discussion Forums‚ go to this week ’s Discussion link in the left navigation: 1. Why Productivity Matters Read "Why Productivity
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glass * Electric hotplate Method: Standing up method 1. An unopened bottle of carbonated drink was weighted. 2. The cap was removed slowly with care‚ controlling the release of bubbles so that the soda water does not form out the top and lose soda water. 3. The opened bottle was left for 1 hour and reweighted. Warming method (uses the reduced water solubility of gas with temperature rise) 1. The open bottle stood carefully on an electric hotplate‚ and stirred using the
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