Question

In: Chemistry

The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+: I2+CH3COCH3H+⟶HI+CH3COCH2I...

The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+:

I2+CH3COCH3H+⟶HI+CH3COCH2I

The reaction can be followed visually by adding starch. The purple starch-iodine complex forms immediately, then disappears when the iodine has been consumed. The kinetics of the reaction may be determined by recording the time required for the color to disappear, which is the time required for the iodine, I2, to be consumed.

 The following data were acquired in an iodination experiment involving acetone. All reaction times are in terms of the rate of disappearance of I2.
Trial Volume of 0.0010 M I2
(mL)		 Volume of 0.050 M HCl
(mL)		 Volume of 1.0 Macetone
(mL)		 Volume of water
(mL)		 Temperature
(∘C)		 Reaction time
(s)
A 5.0 10.0 10.0 25.0 25.0 130
B 10.0 10.0 10.0 20.0 25.0 249
C 10.0 20.0 10.0 10.0 25.0 128
D 10.0 10.0 20.0 10.0 25.0 131
E 10.0 10.0 10.0 20.0 42.4 38

What is the rate constant at 25.0 ∘C based on the data collected for trial B?

Express your answer to two significant figures and include the appropriate units.

Solutions

Expert Solution

queen_honey_blossom answered 2 years ago
Next > < Previous

Related Solutions

The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+: I2+CH3COCH3H+⟶HI+CH3COCH2I...
The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+: I2+CH3COCH3H+⟶HI+CH3COCH2I The reaction can be followed visually by adding starch. The purple starch-iodine complex forms immediately, then disappears when the iodine has been consumed. The kinetics of the reaction may be determined by recording the time required for the color to disappear, which is the time required for the iodine, I2, to be consumed. The following data were acquired in an iodination experiment involving acetone....
The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+: I2+CH3COCH3H+?HI+CH3COCH2I...
The iodination of acetone, CH3COCH3, in aqueous solution is catalyzed by the hydrogen ion H+: I2+CH3COCH3H+?HI+CH3COCH2I The reaction can be followed visually by adding starch. The purple starch-iodine complex forms immediately, then disappears when the iodine has been consumed. The kinetics of the reaction may be determined by recording the time required for the color to disappear, which is the time required for the iodine, I2, to be consumed. The following data were acquired in an iodination experiment involving acetone....
Solve for the rate of the iodination of [acetone]= 0.100 M, [H+]= 0.050 M, and [I2]=...
Solve for the rate of the iodination of [acetone]= 0.100 M, [H+]= 0.050 M, and [I2]= 0.075 M.
A solution contains 4.08 g of chloroform (CHCl3) and 9.29 g of acetone (CH3COCH3). The vapor...
A solution contains 4.08 g of chloroform (CHCl3) and 9.29 g of acetone (CH3COCH3). The vapor pressures at 35 ∘C of pure chloroform and pure acetone are 295 torr and 332 torr, respectively. Assuming ideal behavior, calculate the vapor pressures of each of the components and the total vapor pressure above the solution. I calculated this out and got a vapor pressure of 325 torr; is this right? Why or why not? Can you tell me why and how the...
Rate constants for the gas-phase decomposition of hydrogen iodide, 2 HI(g) → H2 (g) + I2...
Rate constants for the gas-phase decomposition of hydrogen iodide, 2 HI(g) → H2 (g) + I2 (g), are listed in the following table: Temperature (Celcius) k(M-1s-1) 283 3.52*10-7 356 3.02*10-5 393 2.19*10-4 427 1.16*10-3 508 3.95*10-2 (a) Find the activation energy (in kJ/mol) using all five data points. (b) Calculate Ea from the rate constants at 283 °C and 508 °C. (c) Given the rate constant at 283 °C and the value of Ea obtained in part (b), what is...
Rates of Chemical Reactions: The Iodination Of Acetone [CH​3COCH​​3]=4.075 [I​2]=0.007962 [HCl]=1.051 Absorbance of dilute iodine solution...
Rates of Chemical Reactions: The Iodination Of Acetone [CH​3COCH​​3]=4.075 [I​2]=0.007962 [HCl]=1.051 Absorbance of dilute iodine solution at frequency 500nm = 0.506 Teperature of dilute iodine solution = 19.6 degrees System 1 average slope = -.0015945 System 2 average slope = -0.0032355 System 3 average slope = -0.0037095 System 4 average slope = -0.00165 1. Using the equation A=X[I​2​], calculate X 2. Calculate the initial rates of reactions for the four systems (rate is positive) 3. Calculate the initial concentrations of...
At 500 °C, hydrogen iodide decomposes according to 2HI(g)↽−−⇀H2(g)+I2(g)2HI(g)↽−−⇀H2(g)+I2(g) For HI(g)HI(g) heated to 500 °C in...
At 500 °C, hydrogen iodide decomposes according to 2HI(g)↽−−⇀H2(g)+I2(g)2HI(g)↽−−⇀H2(g)+I2(g) For HI(g)HI(g) heated to 500 °C in a 1.00 L reaction vessel, chemical analysis determined these concentrations at equilibrium: [H2]=0.400 M[H2]=0.400 M , [I2]=0.400 M[I2]=0.400 M , and [HI]=3.38 M[HI]=3.38 M . If an additional 1.00 mol of HI(g)HI(g) is introduced into the reaction vessel, what are the equilibrium concentrations after the new equilibrium has been reached? [HI]= [H2]= [I2]= Please help and show work!
The hydronium ion concentration of an aqueous solution of 0.530 M hydroxylamine (a weak base with...
The hydronium ion concentration of an aqueous solution of 0.530 M hydroxylamine (a weak base with the formula NH2OH) is ... [H3O+] = ____M
In aqueous solution, the azide ion, N3−, is a weak base that accepts a proton from...
In aqueous solution, the azide ion, N3−, is a weak base that accepts a proton from water to form the hydroxide ion, OH −, and hydrazoic acid, HN3, according to the following equation. N3−(aq) + H2O(l) equilibrium reaction arrow OH −(aq) + HN3(aq) The base-dissociation constant (Kb) for this base is 4.04 ✕ 10−10. If a 0.085 M solution of azide ions is prepared, what is the final pH of the solution? (Assume that the temperature is 25°C.)
The hydronium ion concentration of a pH neutral aqueous solution is decreased by three orders of...
The hydronium ion concentration of a pH neutral aqueous solution is decreased by three orders of magnitude. Is it acidic or basic? pH increase or decrease? By how many pH units does the pH change? Does the molar concentration of hydroxide increase or decrease? By how many orders of magnitude does the molar concentration of hydroxide change?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT