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ap08_chemistry_form_b_sgs

# Initial a mol l1 0033 0034 0136 0202 initial b mol

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Unformatted text preview: llowing experimental data were obtained. Initial [A] (mol L−1) 0.033 0.034 0.136 0.202 Initial [B] (mol L−1) 0.034 0.137 0.136 0.233 Initial Reaction Rate (mol L−1 s−1) 6.67 × 10− 4 1.08 × 10−2 1.07 × 10−2 ? Experiment 1 2 3 4 (a) Determine the order of the reaction with respect to reactant A. Justify your answer. Between experiments 2 and 3, [B] stays the same and [A] is quadrupled, but the initial reaction rate stays the same. This means that the initial reaction rate is not dependent on [A], so the reaction is zero order with respect to A. (May also justify using mathematics as shown in part (b).) One point is earned for the correct order and for the justification. (b) Determine the order of the reaction with respect to reactant B. Justify your answer. y x rate 2 k [ A]2 [B]2 = y x rate1 k [A]1 [B]1 k (0.034) x (0.137) y 1.08 × 10−2 = where x = 0 k (0.033) x (0.034) y 6.67 × 10−4 16.2 = (4.03) y y = 2, so the reaction is second order with respect to B OR Between experiments 1 and 2, [A] stays the same, [B]...
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