Week 4.docx - Written Assignment 4 Chemical Reactions...

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Written Assignment 4: Chemical Reactions Answer all assigned questions and problems, and show all work. 1. Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygen gas, and use it to explain the following terms: (b) chemical reaction, (c) reactant, (d) product. (12 points) 2H2+O2=2H2o Chemical reaction – process in which a substance is changed into one or more new substances Reactant- The starting material in a chemical reaction Product- What is produced as a result of the chemical reaction 2. Balance the following equations: (18 points) a. C + O 2 CO 2C+02=2CO b. CO + O 2 CO 2 2CO+O2=2CO2 c. Na + H 2 O H 2 + NaOH 2Na+2H20=H2+2NaOH d. Zn + HCl ZnCl 2 + H 2 Zn+2HCl=ZnCl2+H2 e. NaOH + H 2 SO 4 H 2 O + Na 2 SO 4 2NaOH + H 2 SO 4 = 2H 2 O + Na 2 SO 4 f. NH 3 + CuO Cu + N 2 + H 2 O 2NH 3 + 3CuO = 3Cu + N 2 + 3H 2 O 3. Calculate the mass in grams of iodine (I 2 ) that will react completely with 20.4 g of aluminum (Al) to form aluminum iodide (AlI 3 ). (5 points) 2Al+3I2=2AlI3 1 mole of Al is 27 grams 20.4/27=.75 moles .75*(3/2)=1.13 moles of I 1 mole of I2= 254 1 Copyright © 2017 by Thomas Edison State University . All rights reserved.
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1.13*254 = 287 grams (Reference: Chang 3.47) 4. The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust, and other sources is about 26 million tons. The equation for the reaction is
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  • Spring '15
  • Khurana
  • Sulfuric acid, Thomas Edison State University

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