Purpose: The purpose of this lab was to determine the freezing point of pure water‚ the experimental van’t Hoff factor for a substance and the molar mass of an unknown solution. Reagents: 25mL deionized Water ¼ to ½ inches of rock salt 25mL Sodium Nitrate (NaNO3 ) 25mL unknown solution – handle unknown solution carefully Procedure: For part 1‚ the freezing point of deionized water was determined. An ice bath was prepared by filling a 600mL beaker ¾ full of ice and covered with ¼ to
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Sugar Solution vs. Average Density The objective of this lab was to determine the percent (by mass) of sugar in a non-carbonated beverage by measuring its density and using calibration curving showing the density and concertation of standard solution. The procedure used in this experiment was 2 50mL beaker and 10-mL volumetric pipet & pipet pump. 40 mL of deionized water was poured into a 50 mL beaker. Then 10 mL of that deionized water (0% sugar solution) was pipet‚ using the volumetric pipet
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Introduction The Great Depression was probably the most devastating economic catastrophe in US history. As the 1920s went on‚ many grave problems threatened the economy. Despite the fact that some people became rich‚ many others could barely scrape up an adequate living. Many important businesses struggled. Consumers were stuck with deep debts. As the 1930s approached‚ it was clear that the economy was faltering. The superficial wealth of the late 1920s concealed weaknesses that would signal the
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Freezing and Melting of Water. 10/24 Richard Landolfi Due Date:11/1 Purpose the purpose of this lab is to determine the freezing and melting temperature of water. Freezing temperature‚ the temperature at which a substance turns from a liquid to a solid‚ and melting temperature‚ the temperature at which a substance turns from a solid to a liquid. Hypothesis If the water is at a low temperature then it will freeze
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Osmosis coursework Aim: To investigate the effect of different concentration of a sugar solution on the amount of osmotic activity between the solution and pear pieces of a given size. Define osmosis: Osmosis is a net movement of water/ solution molecules from a region of high concentrated area to a region of lower concentrated area through a semi-permeable membrane which lets smaller molecules such as water through but does not allot bigger molecules like glucose to pass through. The molecules
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FREEZING FOODS 1. Freezing storage space is valuable. Use it only for high quality meats‚ fruits and vegetables. Do not freeze and store excessively bulky products. 2. Place a variety of foods in your locker or home freezing unit. Avoid long storage of any items. Add new items as rapidly as storage space will permit. 3. If your locker plant or home-unit has a quick-freeze compartment‚ use it. The temperature of this compartment should be held at 0 or below. The time required for freezing should not
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melt. This only works‚ however‚ if the temperature outside is at or near freezing. If it is too cold outside‚ the ice itself becomes very dry and salt is not as effective in melting it. Salt Reduces Freezing Temperature of Water * Salt works by lowering the freezing temperature of water. Salt water needs to reach a colder temperature than pure water to freeze. This is why salted ice on roads that are near the freezing temperature of pure water (32 degrees Fahrenheit) will melt and not refreeze
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and ideas about these issues to life through dramatic performances and the use of a number of various techniques. No Sugar‚ a revisionist text written by Jack Davis in 1985‚ is one of these stage dramas. Jack Davis brings issues and even expresses his own ideas about issues such as the injustices of Aboriginal treatment during the 1930’s‚ to life in No Sugar very well because No Sugar is a revisionist text‚ and therefore offers a new perspective
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you’re completely alone? The World Health Organization (WHO) estimates that about 121 million people worldwide have felt these emotions before due to some form of depression; however‚ less than 25 percent have access to effective treatment [source: WHO]. Even though many people don’t realize it‚ there is an abhorrent problem with depression among teens in the United States. In fact‚ “11% of adolescents have a depressive disorder by age 18‚” according to the National Institute of Mental Health’s website
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survival of their culture. The Aboriginals haven been take in and dominated to bring them in line with an idealistic European society. These themes have been put forward by Jack Davis in his stage play‚ No Sugar‚ the story of an Aboriginal family’s fight for survival during the Great Depression years. In communicating the racist and unfriendly attitudes of the leading white ideology towards‚ for example‚ discrimination and adjustment‚ Davis constructs characters‚ which are continuously under fire
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