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18 Dec 2019

Q1) The reactant concentration in a zero-order reaction was 8.00×10^-2 M after 135 s and 4.00×10^-2 M after 400 s . What is the rate constant for this reaction?

k0th=_____ _____(appropriate units)

Q2) What was the initial reactant concentration for the reaction described in Q1?

[A]0=_____ _____

Q3) The reactant concentration in a first-order reaction was 8.80×10^-2 M after 50.0 s and 9.90×10^-3 M after 85.0 s . What is the rate constant for this reaction?

k1st=_____ _____

Q4) The reactant concentration in a second-order reaction was 0.270 M after 255 s and 6.40×10^-2 M after 855 s . What is the rate constant for this reaction?

k2nd=_____ _____

Please help I'm really not sure how to start the problem off or what equation is necessary. It would really help if you could explain how the answer was determined so I can understand the problem. Please show work as it would help as well. Thank you

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Jean Keeling
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31 Dec 2019

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Related questions

Hello guys I already answered part A and part B. Please help mewith part C and part D.

The integrated rate laws for zero-, first-, and second-orderreaction may be arranged such that they resemble the equation for astraight line, y=mx+b.
Here is the table:
(Order)------(Integrated RateLaw)------(Graph)------------(Slope)
---(1)---------([A]=-Kt+[A]0)---------------([A] vs.t)-----------(-K)--
---(2)---------(In[A]=-Kt+In[A]0)-----------(In[A] vs.t)---------(-K)--
---(3)---------(1/[A]=Kt+1/[A]0)-----------(1/[A] vs.t)---------(K)--


Part A
The reactant concentration in a zero-order reaction was 0.100 Mafter 195 s and 4.00×10^-2 M after 355 s. What is the rate constantfor this reaction?
the answer is k0th=3.75×10^-4 M/s


Part B
What was the initial reactant concentration for the reactiondescribed in Part A?
the answer is [A]0= 0.173 M


Part C
The reactant concentration in a first-order reaction was 7.50×10^-2M after 50.0 s and 7.00×10^-3 M after 90.0 s. What is the rateconstant for this reaction?

k1st=______ s^-1


Part D
The reactant concentration in a second-order reaction was 0.260 Mafter 295 s and 8.80×10^-2 M after 890 s. What is the rate constantfor this reaction?
k2nd=______M^-1*s^-1


your help is highly appreciated =)

Part A

The reactant concentration in a zero-order reaction was 5.00×10−2M after 130 s and 4.00×10−2M after 310 s . What is the rate constant for this reaction?

Express your answer with the appropriate units.
k0th =

SubmitHintsMy AnswersGive UpReview Part

Part B

What was the initial reactant concentration for the reaction described in Part A?

Express your answer with the appropriate units.
[A]0 =

SubmitHintsMy AnswersGive UpReview Part

Part C

The reactant concentration in a first-order reaction was 9.20×10−2M after 40.0 s and 8.20×10−3M after 95.0 s . What is the rate constant for this reaction?

Express your answer with the appropriate units.
k1st =

SubmitHintsMy AnswersGive UpReview Part

Part D

The reactant concentration in a second-order reaction was 0.130 M after 295 s and 6.60×10−2M after 900 s . What is the rate constant for this reaction?

Express your answer with the appropriate units. Include an asterisk to indicate a compound unit with mulitplication, for example write a Newton-meter as N*m.
k2nd =

SubmitHintsMy AnswersGive UpReview Part

The integrated rate laws for zero-, first-, and second-order reaction may be arranged such that they resemble the equation for a straight line,y=mx+b.

Order Integrated Rate Law Graph Slope
0 [A]=?kt+[A]0 [A] vs. t ?k
1 ln[A]=?kt+ln[A]0 ln[A] vs. t ?k
2 1[A]= kt+1[A]0 1[A] vs. t k

Part A

The reactant concentration in a zero-order reaction was 5.00×10?2M after 175 s and 4.00×10?2M after 400 s . What is the rate constant for this reaction?

Part B

What was the initial reactant concentration for the reaction described in Part A?

Part C

The reactant concentration in a first-order reaction was 6.40×10?2M after 50.0 s and 4.60×10?3M after 60.0 s . What is the rate constant for this reaction?

Part D

The reactant concentration in a second-order reaction was 0.730 M after 210 s and 6.40×10?2M after 705 s . What is the rate constant for this reaction?

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