On July 15‚ 2008‚ Cindy Anthony called the police saying her daughter Casey Anthony stole her car and some money. Later that same day the police received another call from the same person saying that her granddaughter Caylee Anthony had been gone for over a month. When this was heard‚ they knew they had a big case on their hands. The mother Casey Anthony was taken into custody and told many lies concerning the whereabouts of her daughter. The police began to investigate and found some interesting
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Homework 1_Key BCH2333 Winter 2015 Topics covered: review‚ Chemical Evolution‚ Water‚ Non-covalent bonds‚ Acid/base‚ pH 1. i) Convert using scientific notation to liters: 4 nanoliters‚ 4 x 10-9 L‚ 20 microliters‚ 2x10-5 L‚ 35 milliliters‚ 3.5 x 10-2 L‚ 10 deciliters‚ 1 L‚ 7 kiloliters 7 x 103 L ii) Convert using scientific notation to grams: 6 mg‚ 6 x 10-3 g‚ 21 µg‚ 2.1 x 10-5 g‚ 503 ng‚ 5.03 x 10-7 g‚ 10 kg‚ 1 x 104 g 2. Which of the following properties of water explains its ability to dissolve
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Objective: To extract caffeine from tea powder using polar - nonpolar solvent extraction technique. Theory: The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves
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17-Mar 2008 | | Computer in Anthony home used to google chloroform‚ possibly stemming from a joke posted by Casey’s then boyfriend‚ Ricardo Morales‚ with caption: “Win her over with chloroform.” | 19-Mar 2008 | | Casey Anthony receives a birthday check from her 80-year-old grandmother and uses the routing number to steal money from the account. | 21-Mar 2008 | | Computer in Anthony home used to conduct second web search regarding chloroform. Totals: "84 hits‚ a little over 3 minutes in total
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Experiment 1: Isolation of Casein from Milk * pH of milk – 6.6 * milk = 87.1% water‚ 4.9 % CHO 3.9 %‚ fats‚ 0.7% minerals Experiment 2: Protein Hydrolysis and Characterization | Reagents | Principle | Test for | Positive Result | Negative Result | Biuret | CuSO4‚ NaOH | Complexation of Cu+2 with amide N atoms | Polypeptide bonds | Violet/purple solution | Blue color solution | Sakaguchi | 10% NaOH‚ 0.02% α-naphtol solution‚ 2% NaOBr | arginine condenses with α-naphtol and NaOH
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Anesthetic ether is the actually diethyl ether CH3CH2OCH2CH3. It has been used as an anesthetic in medical surgery for over 150 years‚ though the hypnotic effects of ether was already discovered 500 years ago. The historical development of ether anesthesia is very dramatic and interesting. Ether anesthesia: The historical development Ether was discovered in 1275 by Spanish chemist Raymundus Lullius‚ and was named ¡§sweet vitriol." In 1540‚ a German scientist Valerius Cordus described the synthesis
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Constants | Solvent | Formula | Freezing Point (°C) | Kf(°C/molal) | Boiling Point (°C) | Kb(°C/molal) | Water | H2O | 0.0 | 1.86 | 100.0 | 0.51 | Acetic acid | CH3COOH | 17.0 | 3.90 | 118.1 | 3.07 | Benzene | C6H6 | 5.5 | 4.90 | 80.2 | 2.53 | Chloroform | CHCl3 | –63.5 | 4.68 | 61.2 | 3.63 | Ethanol | C2H5OH | –114.7 | 1.99 | 78.4 | 1.22 | Phenol | C6H5OH | 43.0 | 7.40 | 181.0 | 3.56 | Use the previous formula and the constant from Table 1 to calculate the temperature at which a solution of
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Ridge National Laboratory. Vass told the jury that testing of air samples‚ carpet‚ scrapings from the wheel well and a spare tire cover from the car found a handful of compounds associated with human decomposition. Vass also said testing showed chloroform present at a "shockingly high" level on a carpet sample from the trunk. Defense experts‚ including an FBI lab technician‚ disagreed and said they found low amounts of the substance‚ which is also present in many household cleaning
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“He tested the effects of controlled doses of either and chloroform on animals and on humans‚ he made those drugs safer and more effective (BBC‚ 2006).” After making such drugs more secure he presented Queen Victoria the option of using chloroform to help with the birth of both her children‚ Leopold and Beatrice‚ she gladly accepted. In 1848 another cholera outbreak had started and Doctor Snow was
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Introduction Water pollution is a major global problem which requires ongoing evaluation and revision of water resource policy at all levels (international down to individual aquifers and wells). It has been suggested that it is the leading worldwide cause of deaths and diseases‚[1][2] and that it accounts for the deaths of more than 14‚000 people daily.[2] An estimated 700 million Indians have no access to a proper toilet‚ and 1‚000 Indian children die of diarrheal sickness every day.[3] Some
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