In a reaction between A and B, the initial rate of reaction(r_{0})was measured for different initial concentrations of A and B are given below:

A/mol L | 0.20 | 0.20 | 0.40 |

B/mol L | 0.30 | 0.10 | 0.05 |

r | 5.07 × 10 | 5.07 × 10 | 1.43 × 10 |

What is the order of reaction with respect to A and B?

When concentration of B is changed then rate of reaction doesn't change that means order with respect to B is 0. But when the concentration of A is doubled rate increased by 2.82 times i.e.2^{1.5} = 2.82.Hence order with respect to A is 1.5.

Order with respect to A and B is 1.5 and 0 respectively.

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