Exam 3 ch 14 rate laws

Question 1

Rate

Answer 1

Change in concentration of a reactant or product over time

Rate = ^[X] / ^t

Question 2

Stoichiometry and coefficients

Answer 2

Stoichiometry: How much are being reacted

Exponents: How much the reactant matters to the speed

Stoich isnt the exponents for overall reactions

Question 3

Instantaneous rate

Answer 3

-Rate at a specific point in time
-Slope of tangent

1. Draw tangent
2. Pick 2 points on tangent
3. Point 2 - Point 1 / time 2 - time 1

Question 4

Initial rate

Answer 4

-Rate at time 0
-When the reaction is the fastest
-Slope of tangent at time 0

Question 5

Average rate

Answer 5

-Rate over a time period
-Slope of line

rate = C2 - C1 / t2 - t1

Question 6

Units of rate constant

Answer 6

Rate = M/s

-Add exponents

M/ M^x s

-Cancle 1 M

1/ M^y s or M - y -s

Question 7

Units of rate constant and overall order

Answer 7

If written normally : M-s- , add exponents

If written inverse: Add 1 to the M exponent

Question 8

Rate of appearance/disappearance of one species to another

Answer 8

-Stoichiometric coefficients

-Reactants negative
-Products positive

-Directly one species to another you use regular stoichiometry
-if its the whole reaction you use stoichiometry to 1

Question 9

Rate law m = 1

Answer 9

doubling concentration doubles rate

directly related

Question 10

Rate law m = 2

Answer 10

doubling concentration quadrupled rate

Question 11

Rate law m = 0

Answer 11

Rate is independent of concentration

No change regardless

Question 12

Rate law m = negative

Answer 12

Rate decreases as concentration increases

Question 13

Rate law inspections

Answer 13

-Finding A: Keep B constant
-Finding B: Keep A Constant

-Find the relationship between numbers

d Rate = d conc ^x

Question 14

Determining k

Answer 14

-Use 1 trial and plug in numbers with known coefficients

Question 15

Rate law logarithms

Answer 15

Rate 2 / Rate 1 = k[x]^ (2) / k[x]^ (1)