Prelaboratory Questions Name Laboratory Section 1. Consider the reaction below. Co(H;O),?+ (aq) + 4 Cl (aq) COC1,? (aq) + 6 H2O (1) The equilibrium constant expression (K) of the reaction does not include the concentra- tion of H2O even though the reaction produces six moles of water. Explain. 2. In the following reaction, NO2 is a brown gas and N,O4 is colorless. NO2 (g) (brown) = 2 N,O4 (g) (colorless) a) When the temperature decreases, the color of the equilibrium mixture gets lighter. Is this reaction exothermic or endothermic? b) What will happen to the value of the equilibrium constant, K, if the temperature of the reaction is increased? (continued on next page) 193

Prelaboratory Questions Name Laboratory Section 1. Consider the reaction below. Co(H;O),?+ (aq) + 4 Cl (aq) COC1,? (aq) + 6 H2O (1) The equilibrium constant expression (K) of the reaction does not include the concentra- tion of H2O even though the reaction produces six moles of water. Explain. 2. In the following reaction, NO2 is a brown gas and N,O4 is colorless. NO2 (g) (brown) = 2 N,O4 (g) (colorless) a) When the temperature decreases, the color of the equilibrium mixture gets lighter. Is this reaction exothermic or endothermic? b) What will happen to the value of the equilibrium constant, K, if the temperature of the reaction is increased? (continued on next page) 193

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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