B. Effect of Concentration on the Reaction Rate To determine the order of reacti
ID: 482631 • Letter: B
Question
B. Effect of Concentration on the Reaction Rate To determine the order of reaction with respect to IO use system 3 as the starting system and select another system from Systems 4 6) where the [los. was doubled while the [HSO, l was held constant Use the Reaction Rates from these two systems to determine the reaction order for IO3 Round Your Answer To The Nearest Whole Number. NG 1 To determine the order ofreaction with respect to HSO 3, use System 3 as the starting system and select another system (from Systems 4 6) where the [HSO3 was doubled while the [IO3 was held constant se the Reaction Rates from these two systems to determine the reaction order for HSO Round Your NG 1 Answer To The Nearest Whole Number. Two other systems (from Systems 4 6) can be used to determine the order of reaction with respect to HSO3. se the Reaction Rates from these two systems to determine the reaction order for HSO Round NG 05 Your Answer To The Nearest Whole Number.Explanation / Answer
SOLUTION:
Order w.r.t. IO3-
In trial 3 The concentration of IO3- is 9.6 X 10-3 and in trial 5 oncentration is doubled , while as the concentration of HSO3- remains constant. The rate in trial 3 is 3.2 X 10-4 and rate in trial 5 is 4.27 X 10-4
Rate has changed by order 4.27 X 10-4 / 3.2 X 10-4 = 1.33This can be shown as
(Concentration in 3 / Concntration in 4)x = (Rate in 3/ rate in 4) = (2IO3-/IO3-)x = 1.33
(2)x = 1.33 or x = 0.42
Hence order w.r.t IO3- is 0.42 and the nearest whole number is zero. Hence order is 0.
(b) Order w.r.t. HSO3-
Use system 3 and 4
(2HSO3- / HSO3-)x = 12.8 X 10-4 / 3.20 X 10-4 = 4
(2)x = 4 ; x = 2. Hence order w.r.t HSO3- is 2.
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