Question

A reaction generates chlorine gas (Cly) as a product. The reactants are mixed and sealed in a 250-ml. container. After 19.0 minutes, 7.28 10 generated. Calculate the average rate of the reaction mol of Cly has been Average rate= M min Submit Answer Try Another Version 10 item attempts remaining [References) Suppose a small lake is contaminated with an insecticide that decomposes with time. An analysis done in June shows the decomposition product concentration to be 3.14 x 10"mol/L. An analysis done 35 days later shows the concentration of decomposition product to be 6.20 x 10"mol/L. Assume the lake volume remains constant and calculate the average rate of decomposition of the insecticide. Average rate M day

Answer 1

1)

Avarage rate of reaction is avarage for reaction rate during particular time intervel

Avarage rate = ∆[Conc] /∆t

Concencentration of Cl2 at initial = 0

Concemtration Cl2 after 19.0minutes =

(7.28 ×10^-1mol/250ml) × 1000ml = 2.912M

Avarage rate = 2.912M/19.0min

Avarage rate = 1.53 ×10^-1M/min

Note : Given mole values of Cl2 not clear to see , if entered value is wrong correct the value and recalculate.

2)

∆[concentration] = 6.20×10^-4M - 3.14 ×10^-4M = 3.06 ×10^-4M

∆t = 35 days

Avarage rate of formation of decomposition product = 3.06 ×10^-4M/35days = 8.74×10^-6M/day

Therefore

Avarage rate of decomposition of insectiside =

8.74×10^-6M/day