which is seen precipitating as a finely divided red power. Materials: Flask beaker Copper solution Balance Hot plate •150 ml beaker •1 gram of iron power •30 ml of CuSO₄ Procedure: Weigh a clean dry 150 ml beaker. Accurately weigh approximately 1 gram of iron power into the beaker. Do not exceed 1 grams. Measure 30 ml of 1 M. CuSO solution into a graduate cylinder. Pour it into an Erlenmeyer flask‚ and heat gently to almost boiling. Slowly add the hot CuSO solution to the
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Introduction The production of acetone and butanol by means of solvent-producing strains of Clostridium spp. was one of the first large-scale industrial fermentation processes to be developed‚and during the first part of this century it ranked second in importance only to ethanol fermentation. The reason for the almost total demise of this fermentation in the early 1960s was the inability of the fermentation process to compete economically with the chemical synthesis of solvents. However‚ interest
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Titration Lab How Much Citric Acid is in Your Soda? PURPOSE To determine the molarity (concentration) of citric acid (H3C6H5O7) in various different citrus flavored sodas. BACKGROUND PRINCIPLES Popular sodas all strive for a somewhat sour (’tart’) flavor and manufacturers utilize acids to impart this taste. While there are a vast variety of different brands of sodas on the market‚ they can be broken into two main categories: dark or clear. This differentiation is not only a simple color
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Gas Chromatography: Purifying alcohol Introduction The goal of this lab is to understand the principles of chromatography by purifying alcohol using fractional distillation. Running standards with gas chromatography we were able to see and calibrate our data to find not only how much ethanol our alcohol attained but also what a mixed unknown sample contained. Chromatography is a way of being able to separate substances in solution that can help not only identify the analytes (the studied
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few) for their innovative concept especially from the youngsters to which they cater. One day‚ one customer expressed that the only thing that makes customers flock to Chemistea is their use of Erlenmeyer flasks as drinking glasses‚ with which the former would take their selfies. However‚ the use of flasks isn’t only for aesthetic purposes but also for practical reasons (it reduces the risk of spillage and is more eco-friendly than plastic cups). More importantly‚ Chemistea isn’t just named so because
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Student: Mary Chrisin L. ObreroDate: October 7‚ 2014 Section: 116 Behavior of Gases and Determination of Absolute Zero Experiments 4&5 Introduction: First of all‚ the Boyle’s law (pressure-volume law) indicates that the volume of a certain amount of gas given held at a constant temperature differentiates inversely with the applied pressure when there are constant temperature and mass. Equations: PV=C. When pressure goes up‚ volume goes down (derived from the equation above): P1V1 = P2V2 =
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stone‚ and use this as the boiling flask of a distillation set-up. You should pre-weigh a 25 mL round-bottom and use it as the receiving flask. Cool this receiver in an ice bath since the product alkene is fairly volatile. Perform the distillation and collect the purified 4-methylcyclohexene‚ leaving behind a small amount of impurity in the boiling flask. You should record the boiling point range you observed during this process. Reweigh the receiving flask and record the mass of product recovered
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pressure was built up in the separatory funnel but in the bicarbonate separation‚ the gas build up was much greater due to the reaction giving off carbon dioxide. When each product was weighed‚ a white crystalized structure had formed in the erlenmeyer flask. Calculations: Partition Coefficient for Water K = .36g organic layer / .04 grams water layer K = 9.0 Partition Coefficient for Bicarbonate K = .02g organic layer / .40g bicarbonate layer K = .05 Conclusion: From this lab‚ we have
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Isolation‚ purification and characterization of alkaloid caffeine from tea leaves Date Submitted: September 3‚ 2014 Abstract Caffeine is one of the main constituents of tea leaves. In this experiment‚ 0.0039 g of pure caffeine was isolated from tea leaves. This was done through solid-liquid extraction followed by multiple liquid-liquid extraction. Then crude material obtained was then purified by sublimation. The isolated caffeine was subjected to thin layer chromatography (TLC) together
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4. To practice proficiency in performing the following experimental procedures: pippeting a liquid‚ weighing by difference‚ and determining a volume by displacement. Apparatus: Tall glass cylinder‚ glass marble‚ rubber stopper‚ cork‚ 125-mL Erlenmeyer flask with stopper‚ 150-mL beaker‚ 10-mL pipet‚ pipet bulb‚ 100-mL beaker‚ rubber stopper‚ unknown rectangular solid‚ aluminum foil ~10 x 10cm‚ 100-mL graduated cylinder‚ rectangle Materials: Methylene chloride‚ hexane‚ water‚ ice‚ unknown liquids
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