Spring 2020 rev. 10/22/2018 CHEM 51 076e Fireworks! PART B- THE FLARE! 1. Assign coefficients to balance the equation describing the burning flare: CH O(s) + KCIO,(s) _CO,(g) + H,0(g) + KCI (s) 12 22 11 precipitation, acid/base, or redox (circle one) 2. Identify the reaction type for this reaction: 3. Using the rules for assigning oxidation numbers, answer the following questions: a. Which element/atom was reduced?. .......сно к а b. Which element/atom was oxidized?. СНОК CI c. What was the reducing agent?. C12H22O11 KCIO3 CO2 H2O KCI d. What was the oxidizing agent? .. C12H22O11 KCIO3 CO2 H2O KCI e. Which element/atom gained electrons? ..C HOK CI f. How many electrons were gained by each of these atoms? g. How many electrons TOTAL were gained by these atoms in the course of one complete reaction - based on the balanced equation? .. h. Which element/atom lost electrons? . CНOKCI i. How many electrons were lost by each of these atoms?... j. How many electrons TOTAL were lost by these atoms in the course of one complete reaction - based on the balanced equation? ... k. How do the total number of electrons gained in one reaction compare to the number of electrons lost in one reaction? 4. Using the coefficients from the balanced equation, calculate the number of of potassium chlorate required to react with 4.1 g C12H22O11. Show your work. grams exothermic or endothermic 5. Given your observations, describe this reaction as: (circle one) 076-4 076e-Fireworks-Spring2020.docx Last printed 1/10/20 7:31 AM Spring 2020 rev. 10/22/2018 CHEM S1 076e Fireworks! 6. Identify the limiting reagent for this reaction in layer 1 from the reactant quantities. (HINT: How many grams of KCl could be produced from each of these reactant quantities?) 4.0 g C12H22O11 12 g KCIO3 7. Given an approximate reaction enthalpy of -9916 kJ/mol, calculate the energy change for the top-layer of the flare (in kJ). 8. A lit fuse was required to initiate the reaction in the flare. Use this information, along with your previous results to correctly label the reaction coordinate diagram shown below. Use these symbols to label each item in your diagram: reactants (R), products (P), reaction enthalpy (AH), and activation energy (Ea). Reaction Coordinate 076-5 076e-Fireworks-Spring2020.docx Last printed 1/10/20 7:31 AM

Spring 2020 rev. 10/22/2018 CHEM 51 076e Fireworks! PART B- THE FLARE! 1. Assign coefficients to balance the equation describing the burning flare: CH O(s) + KCIO,(s) _CO,(g) + H,0(g) + KCI (s) 12 22 11 precipitation, acid/base, or redox (circle one) 2. Identify the reaction type for this reaction: 3. Using the rules for assigning oxidation numbers, answer the following questions: a. Which element/atom was reduced?. .......сно к а b. Which element/atom was oxidized?. СНОК CI c. What was the reducing agent?. C12H22O11 KCIO3 CO2 H2O KCI d. What was the oxidizing agent? .. C12H22O11 KCIO3 CO2 H2O KCI e. Which element/atom gained electrons? ..C HOK CI f. How many electrons were gained by each of these atoms? g. How many electrons TOTAL were gained by these atoms in the course of one complete reaction - based on the balanced equation? .. h. Which element/atom lost electrons? . CНOKCI i. How many electrons were lost by each of these atoms?... j. How many electrons TOTAL were lost by these atoms in the course of one complete reaction - based on the balanced equation? ... k. How do the total number of electrons gained in one reaction compare to the number of electrons lost in one reaction? 4. Using the coefficients from the balanced equation, calculate the number of of potassium chlorate required to react with 4.1 g C12H22O11. Show your work. grams exothermic or endothermic 5. Given your observations, describe this reaction as: (circle one) 076-4 076e-Fireworks-Spring2020.docx Last printed 1/10/20 7:31 AM Spring 2020 rev. 10/22/2018 CHEM S1 076e Fireworks! 6. Identify the limiting reagent for this reaction in layer 1 from the reactant quantities. (HINT: How many grams of KCl could be produced from each of these reactant quantities?) 4.0 g C12H22O11 12 g KCIO3 7. Given an approximate reaction enthalpy of -9916 kJ/mol, calculate the energy change for the top-layer of the flare (in kJ). 8. A lit fuse was required to initiate the reaction in the flare. Use this information, along with your previous results to correctly label the reaction coordinate diagram shown below. Use these symbols to label each item in your diagram: reactants (R), products (P), reaction enthalpy (AH), and activation energy (Ea). Reaction Coordinate 076-5 076e-Fireworks-Spring2020.docx Last printed 1/10/20 7:31 AM

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter20: Environmental Chemistry-earth's Environment, Energy, And Sustainability

Section: Chapter Questions

Problem 41PS

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