Chemistry Chemistry Practice Problems Solutions Library

Catalyst Solutions Library

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31 solutions

Catalyst

Q. Consider the Potential Energy vs. Reaction Coordinate diagram shown to the right. For each of the following questions, circle the best answer.If a ...

Solved • Mar 16, 2020

Catalyst

Q. Consider the Potential Energy vs. Reaction Coordinate diagram shown to the right. For each of the following questions, circle the best answer.If a ...

Solved • Mar 16, 2020

Catalyst

Q. Consider the Potential Energy vs. Reaction Coordinate diagram shown to the right. For each of the following questions, circle the best answer.If a ...

Solved • Mar 16, 2020

Catalyst

Q. How are the following aspects of a reaction affected by the addition of a catalyst? What other aspects of a catalyzed reaction are different from t...

Solved • Mar 12, 2020

Catalyst

Q. Which statement about catalysts is true?A. Catalysts favor formation of more products.B. Catalysts change endothermic reactions into exothermic one...

Solved • Jan 23, 2020

Catalyst

Q. Define and explain:Catalyst - 

Solved • Jan 21, 2020

Catalyst

Q. Consider the following reaction: 2H 2O2(aq) → 2 H2O(l) + O2(g)When 1.0 g of KI is added to the H 2O2, bubbles of O 2 are produced at an increased r...

Solved • Aug 26, 2019

Catalyst

Q. If the uncatalyzed reaction occurs in a single elementary step, why is it a slow reaction?a. All reactions that occur in one step are slow. b. The ...

Solved • Aug 2, 2019

Catalyst

Q. Classify each statement about catalysts as true or false.• Catalysts are consumed by the overall reaction.• Catalysts speed up chemical reactions.•...

Solved • Aug 2, 2019

Catalyst

Q. The oxidation of SO2 to SO3 is accelerated by NO2. The reaction proceeds according to:NO2(g) + SO2(g) → NO( g ) + SO3 ( g )2NO(g) + O2(g) → 2NO2(g)...

Solved • Dec 6, 2018

Catalyst

Q. Is it reasonable to say that enzymes lower the energy of the transition state for a reaction?

Solved • Dec 6, 2018

Catalyst

Q. Platinum nanoparticles of diameter ~2 nm are important catalysts in carbon monoxide oxidation to carbon dioxide. Platinum crystallizes in a face-ce...

Solved • Dec 6, 2018

Catalyst

Q. Do catalysts affect the overall enthalpy change for a reaction, the activation energy, or both?

Solved • Dec 6, 2018

Catalyst

Q. Many metallic catalysts, particularly the precious-metal ones, are often deposited as very thin films on a substance of high surface area per unit ...

Solved • Dec 6, 2018

Catalyst

Q. Suppose that the reaction A → products is exothermic and has an activation barrier of 75 kJ/mol. Draw an energy curve showing the effect of a catal...

Solved • Dec 6, 2018

Catalyst

Q. Many heterogeneous catalysts are deposited on high surface-area supports. Why is a large surface area important in heterogeneous catalysis?

Solved • Dec 6, 2018

Catalyst

Q. The scenes depict four initial reaction mixtures for the reaction of A (blue) and B (yellow), with and without a solid present (gray cubes). The in...

Solved • Nov 1, 2018

Catalyst

Q. What will happen to the rates of the forward and reverse reactions when a catalyst is added?a. Forward rate increases; reverse rate decreases.b. Bo...

Solved • Mar 23, 2018

Catalyst

Q. How are the following aspects of a reaction affected by the addition of a catalyst?

Solved • Dec 18, 2017

Catalyst

Q. Which of the following statements is incorrect concerning a catalyst?A) A catalyst may appear in the rate law for a reaction.B) A catalyst alters t...

Solved • Dec 18, 2017

Catalyst

Q. What is NOT true for a catalyst? 1. A catalyst is not consumed in chemical reactions. 2. A catalyst can convert an endothermic reaction into an exo...

Solved • Apr 28, 2017

Catalyst

Q. Which of the following is NOT TRUE about the behavior of a catalyst. A) A catalyst accelerates a reaction. B) A catalyst is consumed in an earlie...

Solved • Apr 18, 2017

Catalyst

Q. Which statement most accurately describes the behavior of catalyst? (A) A catalyst increases the ΔG of a reaction and hence the forward rate. (B)...

Solved • May 10, 2016

Catalyst

Q. A catalyst increases the rate of a reaction by (A) changing the mechanism of the reaction. (B) increasing the activation energy of the reaction. ...

Solved • May 6, 2016

Catalyst

Q. A catalyst facilitates a reaction by a) shifting the position of the equilibrium of the reaction. b) lowering the activation energy of the reacti...

Solved • May 3, 2016

Catalyst

Q. Which one of the following statements regarding catalysts is  FALSE? (a) A catalyst is a chemical agent that speeds up the rate of a given reactio...

Solved • May 2, 2016

Catalyst

Q. Which one of the following statements about the effect of a catalyst on a reaction is NOT TRUE? (a) A catalyst has no effect on the equilibrium co...

Solved • Apr 13, 2016

Catalyst

Q. Which of the following correctly describes or depicts a homogenous catalyst? a) The reactants and the catalyst are in the same phase b) A reactio...

Solved • Apr 6, 2016

Catalyst

Q.  Which statements below are always true regarding the addition of a catalyst to a reaction:I. the catalyst is in the same state as the reactantsII....

Solved • Feb 21, 2016

Catalyst

Q. The effect of a catalyst in a reaction is to:a. Increase the rate of the forward reaction, but not affect the reverse rate of the reaction. b. Decr...

Solved • Feb 21, 2016

Catalyst

Q. Identify a heterogeneous catalyst.   A) CFCs with ozone B) Pd in H2 gas C) KI dissolved in H2O2 D) H2SO4 (aq) with concentrated HCl E) H3PO4 ...

Solved • Feb 2, 2016