Hemoglobin (Hb) molecules in blood bind oxygen and carry it to cells, where it t

Question

       Hemoglobin (Hb) molecules in blood bind oxygen and carry it to cells,       where it takes part in metabolism. The first step in the binding of       oxygen is     

      Hb + O2 ? HbO2     

      The reaction is 1st order with respect to Hb, 1st order with respect to O2,       and     

      2nd order overall. The rate constant = 4.0 x 107M       -1 s-1.     

      Calculate the initial rate if the concentration of Hb is 1.8 x 10-9 M       and that of oxygen is 4.6 x 10-5 M.

***Please give a step-by-step explaination!!! I don't understand this at all. The answer should be in M/s. Thanks!!***     

Explanation / Answer

r = K * [Hb] * [O2]

K = 4*10^-7 M-1 s-1

[Hb] = 1.8*10^-9 M

[O2] = 4.6*10^-5 M

r = 4.0*10^7 * 1.8*10^-9 * 4.6*10^-5

r = 3.312*10^-6 M/s

{units are as follows

K * [Hb]*[O2] = r

1/(M*s) * M * M = M/s }

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

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