Chapter 9: Rates of Chemical Reactions

Question 1

reaction rate

Answer 1

• determined by the rate of appearance of a product or disappearance of a reactant
• changes the fastest at the beginning of a reaction

Question 2

factors affecting reaction rates

Answer 2

• nature of the bonds in reacting substances (covalent usually much slower than ionic)
• surface area
• concentration (collision theory)
• temperature (increase by 10* C causes rate to double or triple)
• presence of a catalyst (speeds up reaction by changing the amount of activation energy needed)

Question 3

Reaction Rate Law

Answer 3

rate=k[A]^a[B]^b where A and B are reactants

Question 4

reaction mechanism

Answer 4

-reaction cannot occur faster than the slowest step (rate determining step)