develop an understanding of different types of mixtures including solutions and examine the different solubilities of some solutes and two solvents: water and ethanol Equipment Bunsen burner Tripod Gauze mat Beakers (2 x 100mL) Boiling chips Distilled water Sodium chloride Sodium chloride (solid) Glass rod Measuring cylinder (25mL) Ethanol Watch glass Thermometer 100% Orange Juice 100% Apple Juice 100% Prune Juice Solder Fruit Scone Charcoal Copper(II) Chloride Magnifying glass Procedure A. Homogenous
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Hydrogen H2 285 Ethanol C2H5OH 1367 Ethyne C2H2 1300 Propane C3H8 2220 Sucrose C12H22O11 5650 Octane C8H18 5460 6. A student wished to determine the heat of combustion of ethanol. He used a spirit burner containing ethanol to heat 250g of water in a beaker. The temperature rose from 15oC to 31oC. During combustion‚ the burner lost 0.90g in mass‚ due to the ethanol combusting. Calculate the heat of combustion in ethanol. 7. The heat of combustion of ethanol is 1367 kJmol-1
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An alcoholic beverage is a drink containing chemicals from the alcohol family. Mostly ethyl alcohol (ethanol‚ EtOH)‚ other alcohols are usually present only in small quantities‚ notably consumable t-Amyl alcohol (t-Amylol‚ t-AmOH) which is about 20X more potent than ethanol‚ and hazardous methanol with much weaker sedative effect than ethanol‚ thus are not prohibited by law or regulated by taxation in most if not all countries. However‚ alcoholic beverages are divided into three general classes for
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Miraj Patel Justice or Murder Imagine being isolated because of a blizzard‚ and being a store owner you need to get more supplies‚ but can’t. This is what was going on with Justin‚ general store owner‚ until he found the town’s only hope the town bully‚ Billy. Billy would do the job‚ but he would also “tax” them by taking their items. Justin was getting real tired of Billy’s “tax”. When Billy was found dead‚ it was murder by Justin. First of all‚ Justin killed Billy by knowing there was something
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of an Ethanol Using Fractional Distillation Lab Report Abstract: This experiment aimed to separate the components of a mixture using Fractional Distillation. A volume of 28.0mL of a mixture including ethanol was heated until the temperature reached 78.0 C. Approximately 1.0mL of distillate was collected between 78.0 – 84.0 C. Percent composition by weight of the 1.0mL sample was determined to be 95% ethanol. By careful and accurate techniques‚ a high percent composition of ethanol was achieved
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tribromide‚ bromination with hydrogen peroxide and hydrobromic acid‚ and ethanol replaces the iodine. The figure above demonstrates the equilibrium of pyridinium tribromide with pyridinium hydrobromide‚ which allows gradual release of bromine into the reaction. Some of the benefits of using pyridinium tribromide are (1) weight can be determined more easily as opposed to bromine in liquid form‚ (2) a safer solvent‚ such as ethanol may be used as opposed to a solvent containing chlorine. The reaction
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LAB OF ENTHALPY CHANGE IN COMBUSTION Objective: Determine the Enthalpy change of combustion ΔHc of three different alcohols. Methanol‚ Ethanol and Isopropilic acid. Procedure: 1. Fill the spirit micro burner with Ethanol and weight it 2. Pour 100 cm3 of water into the aluminum cup 3. Arrange the cup a short distance over the micro burner 4. Measure the temperature of water 5. When the temperature of the water has risen by 10°C‚ record the temperature. 6. Reweight
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Cracking of pentane: ▪ pentane [pic] ethylene + propane ▪ C5H12 (g) [pic] C2H4 (g) + C3H8 (g) – Hydration of ethylene (the reverse can also happen known as de-hydration‚ where concentrated acid is used): ▪ ethylene + water [pic] ethanol ▪ C2H4 (g) + H2O (l) [pic] C2H5OH (l) – Hydrogenation of ethylene: ▪ ethylene + hydrogen [pic] ethane ▪ C2H4 (g) + H2 (g) [pic]C2H6 (g) – Hydrohalogenation (more specifically‚ Hydrofluorination) of ethylene: ▪ ethylene
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characters in the text you have studied. George Mackay Brown (1921-1996) This script is about exploring the ways in which George Mackay Brown (GMB) presents relationships between characters in the following seven short stories – Shell Story‚ The Paraffin Lamp‚ The Bright Spade‚ Tam‚ The Wireless Set‚ Three Old Men and Icarus. GMB was from the Orkney Island and presented a clear understanding of Island life from the stories that have been studied. He was the youngest of six children; born 17 October
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in a certain way to extract DNA‚ until we are finally successful in the end. In the wheat germ extraction‚ the ethanol will be able to separate the DNA‚ and it will float between the less dense ethanol and the denser homogenizing mixture. (2) Materials: 1 gram of raw wheat germ. 1 ml of 10 % sodium dodecyl sulfate (SDS) / 1.5 % NaCl solution. 5 ml‚ 95 % ethanol. (Keep ethanol cold‚ preferably on ice‚ prior to use). 15 ml. 50°C-60°C tap water. 1 Test tube with cap. 1 DNA spooler. 2 Pipets
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