Topic 7

Question 1

What does the overall rate of reaction tell you?

Answer 1

Tells you the number of species reacting in the rate determining step

Question 2

Rate equation?

Answer 2

Rate = k[A][B]2 or

Question 3

How can the order of reaction be determined?

Answer 3

Can only be determined from experimental data

Question 4

Zero order graph?

Answer 4

Straight, rate is unaffected

Question 5

First order graph?

Answer 5

Diagonal straight, as concentration is doubled so is rate

Question 6

Second order graph?

Answer 6

Curve, when concentration is doubled, rate is quadrupled

Question 7

Third order graph?

Answer 7

Steep curve, concentration is doubled rate is increased by a factor of 8

Question 8

k equation?

Answer 8

k = rate/[X][Y]2

Question 9

Units of first order

Answer 9

S-1

Question 10

Units of second order

Answer 10

L mol-1 s-1

Question 11

Third order units

Answer 11

L2 mol-2 s-2

Question 12

Fourth order units

Answer 12

L3 mol-3 s-3

Question 13

Fifth order units

Answer 13

L4 mol-4 s-1

Question 14

How does the determining step work?

Answer 14

Only reactants that are in the determining step will be in the rate equation