1(16 pts) Using the following reaction. 3A + 2B- C The reaction is first order w

Question

1(16 pts) Using the following reaction. 3A + 2B- C The reaction is first order with respesct to A, and secornd ordgwihrepet with B a. Provide the rate law for the reaction Y VIA B b. What is the overall reaction order? c. What is the unit of the rate constant? d. How does the reaction rate change if [A] is doubled and B is constant? e. How does the reaction rate change if [B] is halved and A is constant? f. How does the reaction rate change if the temperature is decreased? SIONS auie e How does the raction rate change ir 1B] is halved and A is constant e r down g. If B is being reacted at a rate of -3.35 at what rate are A and C reacting? dby -10.0% Page1

Explanation / Answer

a.

Rate law = k[A][B]2

b.

Over all order = 1 + 2 = 3

c.

Unit of rate constant = L2 / mol2.s (OR) M-2.s-1

d.

If A is doubled rate constant will also be doubled.

e.

If B is halved rate of reactions would be decreased by (1/2)2 = 1/4 times

f.

Rate of reaction would be decreased.

g.

Rate = - ( 1 / 3 ) * d[A] / dt = - ( 1 / 2 ) * d[B] / dt = + d[C] / dt

(/13)d[A]/dt = (1/2)*d[B]/dt

d[A]/dt = (3/2)*(-3.35)

d[A] / dt = - 5.025 M/s

And

d[C] / dt = - (1/2)*d[B]/dt

d[C]/dt = - (1/2) * ( - 3.35 )

d[C] / dt = 1.675 M/s

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