SOS! Please help with rate law problem!

Question

Step 1 : A + B → C + E (slow)

Step 2 : B + E → D (fast)

Predict the rate law if step 1 is slow.

Answer 1

The rate law must contain the slow step, and since the slow step is the first step, we can suggest the following rate law for this reaction:

rate = k[A][B]