1-Write the rate law expression for the reaction A + B C, based on the following

Question

1-Write the rate law expression for the reaction A + B C, based on the following data:

[A] M

[B] M

Rate M/s

5

5

5

5

10

20

10

10

20

a.If the Rate units are M/sec, what is the unit for k?

2-When 20.0 grams of an unknown nonelectrolyte (i=1) compound are dissolved in 500.0 grams of benzene, the freezing point of the resulting solution is 3.77 °C. The freezing point of pure benzene is 5.444 °C and the Kf for benzene is 5.12 °C/m. What is the molar mass of the unknown compound?

3-What is the molality of a solution made by dissolving 12.5 g NaCl in 1 L of H2O?

[A] M

[B] M

Rate M/s

5

5

5

5

10

20

10

10

20

Explanation / Answer

rate given is doubled when concentration of B is doubled hence rate is proportional to B and order withrespect toB is1.

when A is doubled keeping B same rate is not changed so rate doenot depend on A

rate = k [B]

M/s k M

so unit of k is /s or s-1

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.