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In experiment 1 and 2, the concentration of oxygen gas remains constant, the concentration of sulfur dioxide gas doubles and changes from 0.4 M to 0.8 M and the rate of the reaction also doubles from 0.0025 M/s to 0.0051 M/s. This implies that on doubling the concentration of sulfur dioxide, the rate of the reaction also doubles. The order of the reaction with respect to sulfur dioxide is 1.
In experiment 3 and 4, the concentration of sulfur dioxide remains constant, the concentration of oxygen gas changes from 0.2 M to 0.8 M (increases by four times) and the rate of the reaction changes from 0.00125 M/s to 0.0025 M/s (doubles). This implies that on increasing the concentration of oxygen gas by four times, the rate of reaction doubles. The order of the reaction with respect to oxygen gas is half.
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