In the rate equation R=k[A]a [B]b, the order of the reaction is _.
Correct answer: D. a + b
- A. ax b
- B. a - b
- C. b - a
- D. a + b
Explanation
In any chemical reaction, we can have more than two reactants reacting and giving some products. In a rate equation, we multiply the concentration of each reactant used and they all are raised to some powers which are their orders e.g [CH3CH2OH]2. The 2 on ethanol shows its order. So if you want to calculate the order of overall reaction we need to sum up the orders of every reactant. Hence the answer is D.
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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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