UNIT 5 VOCAB

Question 1

Rate of reaction

Answer 1

The change in concentration in a given time frame

Question 2

Order of a reaction

Answer 2

sum of the exponents to which concentrations are raised in the rate equation

Question 3

Rate constant

Answer 3

proportionality constant for a reactant

Question 4

Half life of a reaction

Answer 4

How long it takes for half of the reactants in a reaction to react

Question 5

Rate determining step

Answer 5

the slowest step of a chemical reaction that determines the overall reaction rate

Question 6

rate equation

Answer 6

an equation relating concentration of reactant and reaction rate

Question 7

zero-order

Answer 7

rate of reaction is independent from concentration or amount of reactants

Question 8

first-order

Answer 8

reaction rate proportional to reactant

Question 9

second-order

Answer 9

reaction rate proportional to square of one reactant or product of two reactants

Question 10

heterogenous catalyst

Answer 10

catalyst is in a different phase than reactants

Question 11

homogenous catalyst

Answer 11

catalyst is in same phase as reactants

Question 12

adsorption

Answer 12

separation of a substance from one phase accompanied by its accumulation or concentration at the surface of another

Question 13

desorption

Answer 13

release of an adsorbed substance from a surface

Question 14

instantaneous rate of change

Answer 14

found with slope of tangent line to one point in time on a graph of reactant concentration