Question

1 If Δ[BrO3- ]/Δt = 0.037 M/s. What is [BrO- ]/Δt in M/s?

2 The rate of change of [B] is -0.301 M/min. What is the rate of reaction for the following reaction in M/min? 2A + 5B → 3C + 7D

3 Under a different set of conditions, the rate of change of [C] is 0.194 M/min. What is the rate of change of [D] in M/min?

4 If the rate of change of [C] is 0.038 M/min. What is the rate of change of [A] in M/s?

Answer 1

1 )

Δ[BrO3- ]/Δt = [BrO- ]/Δt   = 0.037 M/s

2)   rate change in B = - d[B]/ dt = -0.301 M/min

rate of reaction with respect to B = - 1/5 * d[B]/ dt

                                                    = 1/5 * 0.301

                                                    = 0.06 M/min

3)

d[C]/dt = 0.194 M/min , d [D] / dt

relation between C and D from reaction

1/3 * d[C]/dt = 1/7 * d[D]/dt

1/3 * 0.194 = 1/7 * d[D]/dt

d[D]/dt = 0.453 M /min

rate chnage with respect to D = 0.453 M /min

4)

d[C]/dt = 0.038 M/min.

1/3 * d[C]/dt = -1/2 * d [A] / dt

1/3 * 0.038 = -1/2 * d [A] / dt

d [A] / dt = - 0.025 M /min