A certain chemical reaction follows thefollowing rate law: Rate =K [A] [B]2 The order of reaction is:
Correct answer: C. 3
- A. 1
- B. 2
- C. 3
- D. 4
- E. 5
Explanation
The order of a reaction is determined by summing the exponents of the concentration terms in the rate law. In the given rate law, Rate = K [A] [B]2, the exponent of [A] is 1, and the exponent of [B] is 2. Thus, the overall order of the reaction is 1 + 2 = 3. Option C is correct. The other options are incorrect because they do not correctly sum the exponents in the rate equation.
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About Order of Reaction
Reaction order shows how the rate depends on the concentration of each reactant, as expressed in the rate law. Coverage includes zero, first and second-order reactions, integrated rate equations, half-life, units of rate constants and the distinction between overall order and molecularity.
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