2. Given the following data, calculate the average rate for the reaction between

Question

2. Given the following data, calculate the average rate for the reaction between bromine and formic acid (Br2 + HCOOH 2Br + 2H' + CO2) for the following times: a. t-0.0s, tr 50.0 b. t-0.0s, tr 100.0 c. t 300.0 s, tr 400.0s rate = 3.8 x 10, M/s rate-3.5 x 10s M's rate-12x105 MS Time (s) Br:l M) 0.0 0.0 100.0 150.0 200.0 250.0 00.0 350,0 400.0 0.0120 0.0101 0.00846 0.00596 0.00500 0.00420 0.00353 0.00296 Write the rate expressions for disappearance of reactant and appearance of product for the following reaction: 3. 4NH dg) + SO2(g) 4N0)(g) + 6H20(g) 4. Consider the following reaction: If the rate of consumption of O: is 0.024 M/s: a. what is the rate of N Os formation? 0.048 Ms b. what is the rate of NO consumption? 0.096 M/s

Explanation / Answer

Ans 2

Average rate =( [A] at ti - [A] at tf) / (tf - ti)

Part a

Average rate =( [Br2] at 0s - [Br2] at 5s) / (50 - 0)s

= (0.0120 - 0.0101)/(50)

= 3.8*10^-5 M/s

Part b

Average rate =( [Br2] at 0s - [Br2] at 100s) / (100 - 0)s

= (0.0120 - 0.00846)/(100)

= 3.5*10^-5 M/s

Part c

Average rate =( [Br2] at 300s - [Br2] at 400s) / (400 - 300)s

= (0.00420 - 0.00296)/(100)

= 1.2*10^-5 M/s

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