Question

Consider the reaction: 3 A + 5 B --> 4 C. The rate of the reaction is found to be .7511 M/s. What is the rate of change of B? Be sure to consider whether the substance is disappearing or appearing in your answer.

Answer 1

-3.7555 M/s is the rate of change of B.

Step-by-step explanation:

3A + 5B → 4C

Given that rate of the reaction ,R= 0.7511 M/s

Rate of the reaction is defined as change in concentration of any one of the reactant or product with respect to time.

`R=(-1)/(3)(dA)/(dt)=(-1)/(5)(dB)/(dt)=(1)/(4)(dC)/(dt)`

`R=0.7511 M/s=(-1)/(5)(dB)/(dt)`

`(dB)/(dt)=5* 0.7511 M/s=-3.7555 M/s`

The negative sign indicates the concentration of reactant B is decreasing with progress in time. This mean reactant B is disappearing.

-3.7555 M/s is the rate of change of B.