Exam 1 Equations/Formulas

Question 1

What is the equation for molarity?

Answer 1

M= mole solute/volume (L) solution

Question 2

What is the equation for molality?

Answer 2

m= mol of solute/kg of solvent

Question 3

What is the equation for mole fraction?

Answer 3

Xa= mol A/total moles of ALL components

Question 4

What is the (normal) equation for 1st order?
graph goes down

Answer 4

Rate=K[A] to the 1 power

Question 5

What is the (normal) equation for 2nd order?
graph goes up

Answer 5

Rate= k[A] to the 2 power

Question 6

What is the (normal) equation for zero order?
graph goes down

Answer 6

Rate=k

Question 7

As temperature goes up, what happens to kinetic energy?

Answer 7

It increases

Question 8

As kinetic energy increases, what happens to the chance of overcoming activation energy?

Answer 8

It increases

Question 9

As temperature increases, what happens to the rate?

Answer 9

It increases

Question 10

What is being described?:
- Increases reaction rate
- NOT a reactant/NOT consumed
- They function to give a LOWER activation energy

Answer 10

Catalysts

Question 11

What is the half-life equation for zero order?

Answer 11

1/2= [A] 0 divided by K

Question 12

What is the half-life equation for 1st order?
is unique b/c concentration is replaced/concentration doesn’t matter

Answer 12

1/2= 0.693 divided by K

Question 13

What is the half-life equation for 2nd order?

Answer 13

1/2= 1 divided by K[A]0

Question 14

What determines how fast a reaction is?

Answer 14

1. Reacting species (what is reacting?)
2. Physical states (more surface area=faster reaction)
3. Temperature (higher temperature=higher reaction rate)
4. Catalyst (functions to increase reaction rate)
5. Concentration