This week’s exercise is about the kinetics of a reaction between a dye and sodium hydroxide (NaOH) which causes the dye’s color to dissipate. This process and therefore the progress of the reaction can bemonitored spectrophotometrically. Let’s review how to interpret kinetic data using an example reactionbetween carmine red (CR ) and NaOH which can be described as:CR NaOH ? CROHred colorlessFor questions 113 suppose you set up a series of reactions using:1) a 1.00 M stock solution of NaOH2) a 6.00E04 M stock solution of carmine redNote that the molar extinction coefficient (or Beer’s Law constant or molar absorptivity) of carmine redis 4.80E 04 L mol1 cm1 and that your reaction cell’s path length is 1 cm.In each of 2 runs you diluted your stock solutions to the volumes indicated in the table below thencombined and began mixing them at t = 0 s. The absorbance of the reaction mixture at 498 nm (theanalytical wavelength of the dye) was the measured every ca. 120 s (run 1) or every ca. 60 s (run 2)beginning at t = ca. 20s.Volume NaOH stockVolume dilute NaOHVolume CR stockVolume dilute CR Run 14 mL50.0 mL5.00 mL50.0 mLDuring run 1 you acquired the following data:Time / s023134265384507616737857Absorbance / au1.441.2570.9910.6130.4140.2840.2080.1260.091During run 2 you acquired the following data:Time / s0Absorbance /au1.44Run 28 mL50.0 mL5.00 mL50.0 mL 22901491942543143904531.3951.0560.9360.7250.6420.5240.4020.332Given the informatin above and the plots equations and goodness of fits criteria shown below what is theconcentration of NaOH in the reaction mixture in run 1 at t = 0 s in mol L 1?Enter Your Answer:Question 2( 1 point )What is the concentration of CR in the reaction mixture in run 1 at t = 0 in mol L1? Enter Your Answer:Question 3( 1 point )What is the absorbance of the reaction mixture be in run 1 at t = 0 s?Enter Your Answer:Question 4( 0.5 points )Based on the goodness of fit values for the plots of run 1 what is the order of the reaction with respect toCR ? Please enter your answer in numeric format (e.g. 3 and not “third order”).Enter Your Answer:Question 5( 1 point )What is the concentration of NaOH in the reaction mixture in run 2 at t = 0 s in mol L1?Enter Your Answer:Question 6( 1 point )What is the concentration of CR in the reaction mixture in Run 2 at t = 0 s in mol L1?Enter Your Answer:Question 7( 0.5 points )Using the plots consistent with the order of reaction with respect to CR determined in question 4 what isthe ratio of the slopes of the relevant plots? Provide your answer in numeric decimal format (e.g. 0.56 andnot 14/25 or 14:25).Enter Your Answer:Question 8( 0.5 points )To the nearest integer what is the order of the reaction with respect to OH ? Provide your answer innumeric format (e.g. 7 and not “seven”).Enter Your Answer:Question 9( 1 point )What is the rate constant extrapolated from the data for run 1?Enter Your Answer:Question 10 ( 1 point )What is the rate constant extrapolated from the data for run 2?Enter Your Answer:Question 11( 0.5 points )In the rate expression:rate = k [CR ]m [OH]nWhat is the value of m?Enter Your Answer:Question 12( 0.5 points )In the rate expression in question 11 what is the value of n? Please provide your answer in numeric format(e.g. 4 and not “four”).Enter Your Answer:Question 13( 0.5 points )What is the average value of k for the two runs?Enter Your Answer:
