Lab #1 Reaction Kinetics in Redox Reactions Procedure: Step 1: Prepare solution of sodium thiosulfate, place 0.25gm (250 mg) of Na2S2O3 in 100ml beaker, add 20 ml of water and mix until dissolved. Step 2: Prepare solution of potassium iodine. Add 10 gm of KI to a 100 ml beaker and add 20 ml of water and mix until dissolved. Step 3: Obtain a 600 ml beaker, add KI and Na2S2O3 solutions, then add 60ml of 1M HCl. Step 4: Finally add 50ml of .1M H2O2, as soon as the H2O2 is added start
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Name: Date: Total Mark: ______/20 Total Mark: ______/20 Covalent Bonding & Molecule properties (H) Questions Q1. The table shows some properties of six compounds. compound | melting point / °C | boiling point / °C | solubility in water | electrical conductivity of solution | copper sulfate | 200 | decomposes | soluble | high | hexane | –95 | 69 | insoluble | does not dissolve | hydrogen chloride | –112 | –85 | soluble | high
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FOSC 610: SCIENTIFIC WRITING ASSIGNMENT 2: CONSENT FORM AHADZI PRISCILLA FATHIA (10309479) CONSENT FORM Title: Effect of institutional sensory test location and consumer attitudes on acceptance of foods and beverages having different levels of processing. Principal Investigator: Laura Melo Address: Department of Biochemical Engineering, School of Chemistry. Federal University of Rio de Janeiro, Brazil. General Information about Research You have been invited
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called chemiluminescence. Chemiluminescence is the direct production of light as the result of a chemical reaction with little or no heat produced. The glow sticks can operate by causing two chemicals to mix. A common reaction used for these devices are hydrogen peroxide and phenol oxalate ester. The hydrogen peroxide is kept in a thin small glass vial in the middle of the stick, and the second chemical phenol oxalate ester is in the main body of the light stick. Bending the light stick in the middle
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Tapered legs are used by woodworkers to build tables, chairs and various other projects. Cutting tapers on legs is a simple procedure that includes using a table saw and a plywood jig. Once you have the jig, it can be used again and again to produce matching tapers on as many legs as needed. When you make different sizes for different legs, you can hang the jigs on the wall and then they will be available for future projects. Things you will need: Wood glue, 2 pieces hardwood, 1 1/4-by-2 1/2-by-36
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III) Methods and Materials To test my hypothesis, I used four individual glow sticks, which was my independent variable. Two of the glow sticks were green, whereas the remaining two were red. However, in order to test the effect of bright colors against dull colors, I wrapped one green and one red glow stick in wax paper in order to make their colors dull, and left the other two unwrapped to give off a brighter color. I conducted one trial per glow stick, ending with four trials in total. I also
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Determination of the Reaction Rate of Mg and HCl Alex Skartvedt Alex Skartvedt, Melanie Ho, Christina Olson, Thor Swerdykiak November 11, 2015 Fall 2015 Semester Abstract: The experimental rate law of the reaction: 2HCl(aq)+Mg(s)→MgCl2(aq)+H2(g) is being determined because kinetics play a large role in the reactions happening in everyday life. The rate law, k value will be obtained in the experiment. To obtain the information a pressure probe was connected to an Erlenmeyer flask in
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As you move down group 1 on the periodic table the atoms get more reactive. As you go down a group the atoms get bigger and bigger this makes it easier for atoms to lose their electrons. The metals react more vigorously with water as you go down the group. Lithium is at the top of the group and when it’s added with water its gets fizzy, floats and moves around the bowl as a gas is given off. When sodium is added with water it moves faster around the bowl, and it turns in to ball and a gas is given
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Lithium: Lithium is the third element on the periodic table which makes its atomic number three. The symbol that is associated with lithium is Li as shown in the spelling of my first name. The atomic mass of lithium is approximately seven. Since the number of protons and electrons are equal to the atomic number, they equal three for lithium. The number of neutrons in lithium equals four. Lithium is a light, silver-white metal which therefore makes it a solid. After the mineral it is in is heated
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This lab report identified different types of reactions in various chemical changes. Through the five experiments completed in class, the creation of bubbles indicating a new gas formed, colour change, and production of light were observed. From reactions A and B, it can be concluded that single displacement reactions are indicated when three elements are present, two of which are of like charges that switch places during the chemical reaction. Both reactions involved an element with a negative charge
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