9. Which one of the following sets of reactants is most likely to have the slowest rate of reaction? a.A covalent compound in solution and an ionic substance in solution. b.Two ionic substances in solution. c.Two solid ionic substances. d.Two covalent compounds in solution. 10. A catalyst that slows down a chemical reaction is known as a, an enzyme b. an inhibitor C. a heterogeneous catalyst d. a converter

9. Which one of the following sets of reactants is most likely to have the slowest rate of reaction? a.A covalent compound in solution and an ionic substance in solution. b.Two ionic substances in solution. c.Two solid ionic substances. d.Two covalent compounds in solution. 10. A catalyst that slows down a chemical reaction is known as a, an enzyme b. an inhibitor C. a heterogeneous catalyst d. a converter

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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3. If you were running a reaction and wanted it to go faster, what three things might you try to accomplish this goal?
Which of the following corresponds to the fastest reaction at room temperature? A. O 100 in Progress of the reaction C OD. 107 Progress of the reaction Progress of the reaction Progress of the reaction
X Incorrect. Be sure to balance all the dissolution equations to make sure you get the correct values for the enthalpies. When 5.75 g of a solid mixture composed of NH4CI and CaCl2 was dissolved in 100.0 mL of water, the temperature of the water rose by 4.22°C. How many grams of each substance was in the mixture? Include the mass of salts in calculation of heat generated. g NH4CI = 5.74 g Cačl2 = 0.44
Which of the following can be used to determine the rate of a chemical reaction? Select one: A. Measuring a change in gas volume B. Measuring a change in mass C. Measuring a change in concentration of a certain species D. All of the above
For a reaction in equilibrium, which of the following is incorrect if the forward reaction is endothermic? A. The reverse reaction is exothermic. B. Decreasing the temperature will favor the reverse reaction. C. Increasing the temperature will favor the forward reaction. D. Only the forward reaction will be affected by changes in temperature.
14. Why does the rate of the reaction decrease over time? A. Exothermic reactions lose heat which cools the reaction which decreases the reaction rate. B. As the reaction proceeds, the concentration of the products results in fewer collisions. C. As the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions. D. Not all molecules will react and some choose to stay in their present form. E. none of the above
Answer the 1st question
How does low concentration affect reaction rate? A. It decreases the amount of reactants B. It increases the frequency of particle collisions C. It highers the activation energy D. It increases the energy of particle collisions
10. The rate of reaction measures how fast a reactant is consumed or a product is formed. The rate is expressed as the ratio of the change in the concentration to elapsed time. A. Only the first statement is correct. B. Only the second statement is correct. C. Both statements are correct. D. Both statements are incorrect.
20. Equilibrium is the state in which a. The rate of the forward reaction is greater than the reverse reaction. b. The rate of the reverse reaction is greater than the forward reaction. c. The rate of the forward reaction and reverse reaction are equal. 21. What is a catalyst?
Which of the following is an application of the influence of temperature on chemical reaction rates? a. a solution is heated so more sugar can be dissolved in it b. food is put into a refrigerator to keep it from spoiling c. water is evaporated from a salt-water solution in order to recover solid salt d. more than one response is correct
1. Reactions that occur in the gaseous state are affected by changing the volume of the container. Which choice best describes what will happen to the reaction if the volume of the container is decreased? The reaction will shift right. The reaction will shift left. The reaction will not change. The reaction will speed up.