Question

The rate of the reaction $A+B_2\to AB+B$; is directly proportional to the concentration of A and independent of concentration of $B_2$, hence, rate law is:

• A. $k\left[A\right]\left[B_2\right]$
• B. $k\left[A{]}^2\right[B_2]$
• C. $k\left[A\right]$
• D. $k\left[B_2\right]$

Answer 1

The correct option is C $k\left[A\right]$

The reaction rate is the change in concentration per unit time, either the decrease of concentration per unit time of a reactant or the increase of concentration per unit time of a product. Since the rate is independent of the concentration of B and directly proportional to A, we can write

Rate, r $=k\left[A\right][B{]}^0$

r $=k\left[A\right]$