Name: Brandon Upton Thomas Edison State University General Chemistry I with Labs (CHE-121) Section no.: 4 Semester and year: Feb 2020 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) H2+(aq) + O2-(aq) H2O b) The (+) attract to the (-) and vice versa no units left undissociated as the equation is balanced. c) Hydrogen and Oxygen are the beginning reactants d) Water is the product after chemical reaction 2. Balance the following equations: (18 points) a. C + O 2 → CO 2C+O 2 2CO b. CO + O 2 → CO 2 2CO+O2 2CO 2 c. Na + H 2 O → H 2 + NaOH 2Na+2H 2 O H 2 +2NaOH d. Zn + HCl → ZnCl 2 + H 2 2Zn+4HCl 2ZnCl 2 + 2H 2 e. NaOH + H 2 SO 4 → H 2 O + Na 2 SO 4. 2NaOH+H 2 SO 4 2H 2 O+Na 2 SO 2 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) (Reference: Chang 3.47) 288gI 2 4.
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