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In the reaction $$A + B \rightarrow$$ products, if the concentration of B is kept constant and concentration of A is doubled, the rate becomes four times of initial rate and when A is kept constant and concentration of B is doubled rate remains the same. This indicates that reaction rate is proportional to the __________ of concentration of ___________ and rate equation is _____________.
Correct Answer: 0
PLACEHOLDER ANSWER - the answer is three words or expressions. Doubling A multiplies the rate by $$4 = 2^2$$, so the order in A is 2, and doubling B leaves the rate unchanged, so the order in B is 0. The rate is proportional to the square of the concentration of A, and the rate equation is $$\text{rate} = k[A]^2$$.
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