Integrated Rate Laws

The t_1/2 for the decomposition of hydrogen iodide, a second order reaction, is 253 seconds. Determine the rate constant if its initial concentration is 0.05 M.

• 0.08 M^-1s^-1

• 0.08 Ms^-1

• 0.04 M^-1s^-1

• 0.04 Ms^-1

Tags

NGSS.HS-PS1-5

Given: CH₃COCH₃ + Cl₂ -> CH₃COCH₂Cl + HCl

The given reaction is zero order with respect to Cl₂ and first order with respect to CH₃COCH₃. Determine the concentration of CH₃COCH₃ after 30 seconds if the initial concentration of CH₃COCH₃ is 0.025 M and the rate constant at 25 ^oC is 1.32 x 10^-1 s^-1.

• 4.77 x 10^-4 M

• 4.77 x 10^-2 M

• 4.77 x 10^-3 M

• 4.77 x 10^-6 M

Tags

NGSS.HS-PS1-5

Given the half-life of a first order reaction is 25 minutes, determine the ratio of the final concentration to its initial concentration after 1 hour.

• 0.189 : 1

• 5.28 : 1

• 0.189 : 5.28

• 1 : 1

The decomposition of a compound A into its products has a rate constant of 0.083 mol dm^-3 min^-3 at 380 K. How long will it take for the concentration of A to drop to 1.00 mol dm^-3 if at t = 0.0 min [A] is 3.50 mol dm^-3.

• 30.1 minutes

• 15.1 minutes

• 43.1 minutes

• 8.6 minutes

Tags

NGSS.HS-PS1-5

The decomposition of a MM into its products has a rate constant of 0.083 mol dm^-3 min^-3 at 380 K. Calculate the concentration of MM after 600 seconds it the initial concentration is 3.50 M.

• 2.67 M

• 1.53 M

• 0.90 M

• 3.33 M

Tags

NGSS.HS-PS1-5

At 180 ^oC, the decomposition of a gaseous compound XO₂ has the half-life of 38.6 min and its half-life is not affected by the change in the pressure of XO₂. The initial pressure of XO₂ is 372.5 kPa. What is the rate of decomposition of XO₂?

• 6.71 kPa/min

• 6.71 min-1

• 6.71 kPa^-1min^-1

• 6.71 kPa^-1min

Tags

NGSS.HS-PS1-5