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2010F - CHEM 126101 Chapter 13 Basic Homework Kinetics I

2010F - CHEM 126101 Chapter 13 Basic Homework Kinetics I -...

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10F - CHEM 126101 - GEN CHEMISTRY II You are logged in as Andrew Sindt ( Logout ) You are here NJIT / ► 2010F - CHEM 126101 / ► Quizzes / ► Chapter 13 Basic Homework: Kinetics I / ► Review of attempt 2 Chapter 13 Basic Homework: Kinetics I Review of attempt 2 Started on Saturday, 4 September 2010, 09:40 PM Completed on Saturday, 4 September 2010, 09:45 PM Time taken 5 mins 21 secs Finish review
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Marks 24/26 Grade 3.69 out of a maximum of 4 ( 92 %) Question 1 Marks: 1 For the reaction: 3BrO-(aq) --> BrO3-(aq) + 2Br-(aq) [BrO - ] initial is 0.92 M. 33 seconds later [BrO - ] is 0.14 M. What is the rate of change of [BrO - ] in M/s? (The brackets, [ ], indicate concentration, that is, molarity (M) or moles/liter.) Help: Rate of change defined Answer: Notice that the rate of change of a reactant is negative because it is being used up. Correct Marks for this submission: 1/1. Question 2 Marks: 1 Under a different set of conditions, the initial concentration of Br - is 0.00 M. 23 seconds later it is 0.11 M. What is the rate of change of Br - in M/s? Answer: Notice that the rate of change of a product is positive because it is being produced. Correct Marks for this submission: 1/1. Question 3 Marks: 1 Under a different set of conditions, the initial concentration of BrO 3 - is 0.19 M. 19 seconds later it is 0.58 M. What is the rate of change of BrO 3 - in M/s? Answer: Notice that the rate of change of a product is positive because it is being produced. Correct Marks for this submission: 1/1. Question 4 Marks: 1 Still for the reaction: 3BrO-(aq) --> BrO3-(aq) + 2Br-(aq) , what is the rate of reaction in M/s, if Δ[BrO - ]/Δt = (-0.265) M/s? Help: Rate of reaction Answer: Note that the rate of reaction is always positive. Correct Marks for this submission: 1/1.
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Question 5 Marks: 1 Under a different set of conditions Δ[BrO 3 - ]/Δt = 0.023 M/s. What is the rate of reaction in M/s? Answer: Note that the rate of reaction is always positive. Correct Marks for this submission: 1/1.
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