NAME SECTION DATE NB 110 TECH 110 RS 180 TOTAL /100 Data: Be sure CHEMICAL KINET
ID: 489902 • Letter: N
Question
NAME SECTION DATE NB 110 TECH 110 RS 180 TOTAL /100 Data: Be sure CHEMICAL KINETICS Run to label each column with the proper units H2O2 iKIUNI Temperature Best Rate mur 2100 20 mal Attach your rate graph (s). Be sure they are formatted properly. 1. Describe how you arrived at the best rate for each run. Consider these questions in your answer: are the rates all the same in a given run? Should they be? Are the rates consistent within a run and between runs? to at tne best rates, my partner and record ud The inital Point of water and ending 30 second intervous we recerdad as oz os produce. We used the inital The Vuume of voiune of wata and Substracted the amount of water uft at end of 5 mins 2. Using the differences in initial concentrations and rates that you observed in runs (2) through disudu (5), write the rate-law expression for the decomposition of Hron. Explain how you arrived at b? Sto your rate-law expression. 3. If your rate is expressed as change in molar concentration per second (M/s), what are the units for the rate constant (k). (Hint: The units for k can be anything; think about what units need to be cancelled out in order to achieve the proper rate unit M/s).) 4. How does affect the reaction rate? Explain using your data and propose a hypothesis to explain the effect.Explanation / Answer
Looking at the data in the table,
2. When the concentration of either of the two [H2O2] or [KI] was doubled, the rate also doubled.
that is rate is second order with respect to both the reactants
rate law would be,
rate = k[H2O2]^2.[KI]^2
3. Unit of rate constant would be,
= M-3.s-1
4. Temperature as expected increases the rate of reaction as shown clearly from the first and the last data set. This is because temperature increases molecular motion and more molecules collide and reach the energy of activation barrier easily.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.