Name: Craig Meszaros College ID:0601118 Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: Semester and year: July 2019 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) a. 2 2 2 2H O 2H O b. Chemical reaction – The chemical reaction is the rearrangement of atoms into different combinations, but exact combinations in which new substances forms have different properties than the original substances. In the following equation energy is released in the form of heat. Hydrogen gas an Oxygen gas then combine to form liquid water. c. Reactants – The reactants are the starting substances like Hydrogen and Oxygen they are both elements and both have atomicity. This means that a molecule of Hydrogen has 2 atoms and a molecule of Oxygen has 2 atoms. d. Product – The new substance formed is water, the compound form is 2 H O Water is a covalent bond. In every molecule of water two hydrogen atoms are sharing their total of two electrons with oxygen, which has 6 electrons in the outermost shell. 2. Balance the following equations: (18 points) a. C + O 2 → CO - 2 2C O 2CO b. CO + O 2 → CO 2 - 2 2 2CO O 2CO c. Na + H 2 O → H 2 + NaOH - 2 2 2Na 2H O H 2NaOH 1 Copyright © 2017 by Thomas Edison State University . All rights reserved.
d. Zn + HCl → ZnCl 2 + H 2 - 2 2 Zn HCI ZnCl H e. NaOH + H 2 SO 4 → H 2 O + Na 2 SO 4 - 2 4 2 4 2NaOH H SO 2H O NaSO f. NH 3 + CuO → Cu + N 2 + H 2 O - 3 2 2 2NH 3CuO 3Cu N 3H 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) a.
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