Question

In: Chemistry

You are studying the reaction of iodine with a ketone to produce iodoketone with the following...

You are studying the reaction of iodine with a ketone to produce iodoketone with the following equation:

I₂ + ketone → iodoketone + H⁺ + I^-

Data for initial rates and concentrations are given in the table below:

-d[I₂]/dt [I₂] [ketone] [H⁺]

mol^-1 L s^-1 M M M

7 x 10^-5 5 x 10^-4 0.2 1.0 x 10^-2

7 x 10^-5 3 x 10^-4 0.2 1.0 x 10^-2

1.7 x 10^-5 5 x 10^-4 0.5 1.0 x 10^-2

5.4 x 10^-5 5 x 10^-4 0.5 3.2 x 10^-2

A. 0, 1, 0
B.0, 1, 1
C.1, 1, 1
D.1, 2, 0

Calculate the average rate coefficient in te above question.

A.0.003
B.0.013
C.0.025
D.0.034

Expert Solution

-d[I₂]/dt [I₂] [ketone] [H⁺]

mol^-1 L s^-1 M M M

0.7 x 10^-5 5 x 10^-4 0.2 1.0 x 10^-2

0.7 x 10^-5 3 x 10^-4 0.2 1.0 x 10^-2

1.7 x 10^-5 5 x 10^-4 0.5 1.0 x 10^-2

5.4 x 10^-5 5 x 10^-4 0.5 3.2 x 10^-2

Q.1) Answer is (B) 0, 1, 1

From trial 1 & 2 : [I2] changed but rate has not changed so zero order w.r.t I2.

From trial 2 & 3 : [ketone] increased by 2.5 and rate has also increased by 2.5 so 1^st order w.r.t ketone.

From trial 2 & 3 : [H⁺] increased by 3 and rate has also increased by 3 so 1^st order w.r.t H⁺.

Q.2)

rate = k x [ketone][H⁺] or, rate coefficient = k = rate / {[ketone][H⁺]}

For trial #1: k = 0.7 x 10^-5 /(0.2 x 1.0 x 10^-2) = 0.0035 s^-1M^-1

For trial #3: k = 1.7 x 10^-5 /(0.5 x 1.0 x 10^-2) = 0.0034 s^-1M^-1

For trial #4: k = 5.4 x 10^-5 /(0.5 x 3.2 x 10^-2) = 0.0034 s^-1M^-1

So the answer is (D) 0.0034

queen_honey_blossom answered 1 year ago

In this experiment, benzyl and dibenzyl ketone will produce tetraphenylcyclopentadienone via aldol condensation reaction. 1.) What...

In this experiment, benzyl and dibenzyl ketone will produce tetraphenylcyclopentadienone via aldol condensation reaction. 1.) What is a condensation reaction? What is the small molecule lost in this reaction? 2.) In this reaction, all the reactants are ketone compounds. Can condensation reactions be extended to other carbonyl compounds than ketones? 3.) What is an enol? In a tautomerization equilibrium, will the enol or the keto isomer will be favored? 4.) What is the driving force for the enolization? (what causes...

Kc for the reaction of hydrogen and iodine to produce hydrogen iodide. H2(g) + I2(g) ⇌...

Kc for the reaction of hydrogen and iodine to produce hydrogen iodide. H2(g) + I2(g) ⇌ 2HI(g) is 54.3 at 430°C. Calculate the equilibrium concentrations of H2, I2, and HI at 430°C if the initial concentrations are [H2] = [I2] = 0 M, and [HI] = 0.547 M. [H2]= [I2]= [HI]=

You are studying the kinetics of the reaction: &nb

You are studying the kinetics of the reaction: H2(g) + F2(g) → 2HF(g) You are attempting to determine a mechanism for the reaction. You run 2 separate reaction trials keeping one reactant at a much higher pressure than the other reactant. The lower pressure reactant begins at 1.000 atm. OOPS! You forget to record which reactant was at the higher pressure. The data you collected for the first trial are: Pressure of HF(atm) Time(min) 0 0 0.300 30.0 0.600 ...

You are studying the kinetics of the reaction: (this is due tomorrow!!) ...

You are studying the kinetics of the reaction: (this is due tomorrow!!) H2(g) + F2(g) → 2HF(g) You are attempting to determine a mechanism for the reaction. You run 2 separate reaction trials keeping one reactant at a much higher pressure than the other reactant. The lower pressure reactant begins at 1.000 atm. OOPS! You forget to record which reactant was at the higher pressure. The data you collected for the first trial are: Pressure of...

Starch+Iodine are reacted to produce a Starch-Iodine complex. 10mL were then placed in 2 test tubes....

Starch+Iodine are reacted to produce a Starch-Iodine complex. 10mL were then placed in 2 test tubes. test tube one was heated to 80 degrees Celsius, and the result was a color change to yellow. testtube two was cooled in an ice water bath, and no change was observed. based on this, "Discuss how and why equilibrium was affected by each stress. be specific, inlcude the exothermicity/endothermicity of the rxn as it applies.

The reaction of the persulfate ion with the iodine ion at room temperature is: S2O82-...

The reaction of the persulfate ion with the iodine ion at room temperature is: S2O82- + 2 I- ↔ 2 SO42- + I2 , so rate = k [S2O82-]x [I-]y The following data was collected at room temperature: Experiment [S2O82-] (M) [I-] (M) Initial Rate (M/s) 1 0.10 0.15 2.61 x 10-5 2 0.20 0.15 5.21 x 10-5 3 0.10 0.30 5.24 x 10-5 Determine the following: (a) The rate law (including exponents for S2O82- and I-) (b) The...

A reaction was performed in which 0.47 g of dibenzyl ketone was reacted with 0.47 g...

A reaction was performed in which 0.47 g of dibenzyl ketone was reacted with 0.47 g of benzil to make 0.68 g of 2,3,4,5-tetraphenylpentadienone. Calculate the theoretical yield and percent yield for this reaction.

1. Consider the following redox reaction to produce methanol:

1. Consider the following redox reaction to produce methanol: 2CH4(g) + O2(g) --> 2CH3OH(g). a. Calculate the change in enthalpy for the reaction at standard conditions using bond dissociation energies. See the b. appendix for the table of bond energies. b. Name two things that you could do to favor the formation of methanol by this reaction. c. Using the value of ∆H calculated in 1a, is this an exothermic or endothermic reaction? Explain your answer. d. Methane gas...

1 Substrate that use to produce liver ketone body 2.Intermediate that find in both carbohydrate and...

1 Substrate that use to produce liver ketone body 2.Intermediate that find in both carbohydrate and fatty acid degradation. 3.Which molecule is the causative of acidosis in human? 4.Amino acid that used to control urea cycle. 5.Intermediate which play an important role in rate limiting step of fatty acid synthesis and degradation.

A student is studying a reaction between reactants A and B. the reaction is second order...

A student is studying a reaction between reactants A and B. the reaction is second order with respect to A, but zero order with respect to B. Explain in 5-6 sentences what this means. If the Concetration of A is tripled what will the effect be on the reaction rate? If the concentration of B is increased 10 times, what will the effect be on the reaction rate?