Chemistry Title: voltaic cell experiment a voltaic cell is a device made from connecting two different metals together and immersing the combined piece into some sort of solution that creates conductive atmosphere ‚ the general purpose of a voltaic cell is to convert the chemical reaction between the metals and the solution into an electrical charge ‚ Hypothesis: the voltage produced by magnesium and cupper = the sum of the voltage produced by magnasium and iron ; and iron and cupper
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The Rate of a Reaction The area of chemistry that deals with the rate or speed of chemical reactions is known a chemical kinetics. The word “kinetic” is derived from the Greek name kinitikos that means movement or motion. In the present context‚ the kinetic means the reaction rate or rate of a reaction that is defined as the change in concentration of a reactant or a product with time (M/s). Chemical reaction can be represented by the following general equation. Reactants Products It is very important
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Q.1 Bond enthalpy of fluorine is lower than that of chlorine‚ why? Q.2 Give the IUPAC name of the following compound: (CH3)3-C-C-COOH ║ O Q.3 On increasing temperature‚ activation energy of a reaction decreases‚ why? Q 4 Which of the following is most effective electrolyte in the coagulative of AgI/Ag+sol? K2SO4‚ MgCl2‚ K4[Fe(CN)6] Q.5 Write the reaction when glucose is heated with excess of HI. Q.6 Which Xe compound has distorted octahedral shape? Q.7 What is the denticity of
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Chemistry 101 Chapter 4 Practice Test February 2013 1. A 20.0-g sample of HF is dissolved in water to give 2.0 102 mL of solution. The concentration of the solution is: a) 1.0 M b) 3.0 M c) 0.10 M d) 5.0 M e) 10.0 M Ans: d) 5.0 M Page: 4.3 2. Which of the following aqueous solutions contains the greatest number of ions? a) 400.0 mL of 0.10 M NaCl b) 300.0 mL of 0.10 M CaCl2 c) 200.0 mL of 0.10 M FeCl3 d) 200.0 mL of 0.10 M KBr e) 800.0 mL of 0.10 M sucrose ANS:
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Chemistry class (XI-XII) Objectives 1. To promote understanding of basic principles of Chemistry. 2. To apply the concepts of Chemistry useful in real life situation for making learning of Chemistry more rele vant‚ meaningful and interesting. 3. To develop positive scientific atti tude and appreciate contribution of Chemistry towards the improvem ent of quality of human life. 4. To develop problem solving skills and nurture curiosity‚ aesthetic sense and creativity. 5. To inculcate
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Alexander Schwartz Dr. Kerr 10 April 2013 A Comparison of Light Yagami and L from the Series Death Note Death Note is an anime/manga (Japanese cartoon/comic book) series about a college student‚ Light Yagami‚ and his quest to rid the world of evil. The adventure begins when he finds what is called the Death Note. The Death Note is a book that can kill a person if that person’s name is written into it. With Light’s twisted sense of justice‚ he attempts to transcribe the name of every criminal
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filter flask with side tube‚ three glass capillary tubes‚ a set of melting point apparatus‚ one long hollow glass tubing‚ one electronic balance‚ one heater and the oven Background: Stereochemistry is always encountered throughout organic chemistry. And stereochemistry isomerism can be divided into two classes‚ geometrical isomerism and optical isomerism. Although these categories are not mutually exclusive‚ it is not uncommon to find compounds that exhibit only one or the other of the
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1. What is Chemistry? The study of the composition‚ structure‚ and properties of matter. The processes that matter undergoes and the energy changes that accompany these processes. 2. What is the formula for density? If I give you the density of a substance and the volume‚ you should be able to tell me the mass… Density = Mass/Volume 3. Compare and contrast intensive and extensive properties. Give an example of each. Extensive properties depend on the amount of matter that is present. Such
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What does chemistry do to help us and how important is it? To go about answering these questions‚ we must find out where in our daily activities‚ chemistry is involved and how it benefits us. Without realising‚ chemistry is used in all part of our lives and some of its features are more recognised by specific user groups‚ for example a kid wouldn’t be interested in how chemistry makes their fathers shaving foam more lubricant. I believe looking at the problem from this perspective would
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Materials: • Graduated cylinder • 2 marbles • Liquids to test such as water‚ corn syrup‚ canola oil‚ motor oil • Masking tape • 1 cm ruler • Stopwatch that is accurate to 0.1 or 0.01 seconds SAFETY NOTE: See Texas Science Safety Manual for lab and investigation guidelines: http://www.tenet.edu/teks/science/safety/safety_manual.html Engagement: Place a wooden ramp on a stack of books. Challenge students to predict which of three liquids (syrup‚ water‚ and motor oil) will reach the bottom
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