. a) changing the nature of the reactants Changing the nature of the reactants might increase or decrease the rate of reaction. The change would result from a change in activation energy and/or a change in the requirements that the reactants have a particular orientation when they collide. b) increasing the concentration of one or more of the reactants c) raising the temperature at which a reaction is performed d) increasing the surface area of a solid reactant e) adding an appropriate catalyst

. a) changing the nature of the reactants Changing the nature of the reactants might increase or decrease the rate of reaction. The change would result from a change in activation energy and/or a change in the requirements that the reactants have a particular orientation when they collide. b) increasing the concentration of one or more of the reactants c) raising the temperature at which a reaction is performed d) increasing the surface area of a solid reactant e) adding an appropriate catalyst

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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A is a substance that increases the rate of a reaction without being used up during the reaction. O catalyst O product O reactant O solute
For number 9 I need the words to match the meaning for all of them
Which of the following statements is true, according to the collision theory? Question 15 options: All collisions result in reactions. Entities must collide to react. Entities that collide but are incorrectly oriented will form a different product. All entities in a collision have the same quantity of kinetic energy.
TRUE OR FALSE 1. Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles. 2. Usually lowering the temperature will slow down a reaction. 3. Increasing the concentration of the reactants will slow down the reaction. 4. A catalyst increases the efficiency of collisions between reactants 5. You observe bubbles after adding metal to a solution. Do you assume a chemical reaction took place? YES OR NO?
4. Two chemical reactions are represented below. The potential energy diagram is shown below for reaction 1. The potential energy of the reactants of reaction 2 are also shown in the diagram. Reaction 2 is endothermic and it has a larger activation energy than reaction 1. Based off of this information complete the energy diagram for reaction 2 on the graph below. Reaction 1: A +B → C Reaction 2: X + Y → Z Energy X +Y A + B Reaction Pathway
The reaction rate of a chemical reaction will increase as a result of changes made to the system, as long as those changes increase what factor? O Amount of empty space between reactants O Number of collisions between reactants O Electrical charge of the reactants O Atomic mass of the reactants
Answer the 1st question
Why does the rate of most reactions decrease over time? A. A decrease in reactant concentration reduces the frequency of successful collisions. B. A decrease in temperature reduces the average kinetic energy of the particles. C. An increase in product concentration interferes with the effectiveness of the catalyst. D. An increase in pressure of the system reduces the movement and energy of particles.
9. The rate of reaction can be expressed through_____ A. chenge in concentration in time over volume b. change in concentration reactant or product over time c. change in concentration reactant or product over volume d. change in concentration collision or energy over volume
Iron fillings (very small pieces of iron) rust faster than iron nails. This demonstrates that the rate of reaction depends on the a. temperature of the reactants b. chemical nature of the reacting substances c. state of subdivision of the reactants d. concentrations of the reactants e. presence of a catalyst
1. what name is given to the minimum amount of energy needed by particles for them to react when they collide? a. activation energy b. catalytic energy c. threshold energy d. starter energy 2. collision theory is based on the assumption thay for a reaction to occur, it is necessary for the reacting specie's to come together/collide with one another. Which of the following statement is NOT true about collision? a. reacting substance b. reactants must collide in the correct orientation c. reacting substances can collide in any orientation d. reacting substances must collide with enough energy to form an activated complex
How does a catalyst increase the rate of a chemical reaction? A.By increasing the concentrations of the reactants B. By decreasing the speed of the molecules C. By lowering the energy of the products D. By lowering the activation energy