Useful Formulae

Question 1

What is the rate equation?

Answer 1

Rate=k[A]^m[B]ⁿ

Question 2

What is the Arrhenius Equation?

Answer 2

k=Ae^-E_a/RT

Question 3

What is the equation for the Entropy change of a system?

Answer 3

ΔS_system = ΔS_products - ΔS_reactants

Question 4

What is the equation for Entropy change of the surroundings?

Answer 4

ΔS_surroundings = -ΔH/T

Question 5

What are 2 equations for total entropy change?

Answer 5

ΔS_total = ΔS_system + ΔS_surroundings

ΔS_total = RlnK

Question 6

What is the equation for the Equilibrium Constant (solutions)?

Answer 6

Kc = ([D]^d[E]^e)/([A]^a[B]^b)

Question 7

What is the equation for Partial Pressure?

Answer 7

partial pressure = mole fraction of gas X total pressure

Question 8

What is the equation for the Equilibrium Constant (gases)?

Answer 8

Kp = (p(D)^dp(E)^e)/(p(A)^ap(B)^b)

Question 9

What is the equation for the Ionic product of water?

Answer 9

K_w = [H⁺][OH^-]

Question 10

What is the pH formula?

Answer 10

pH = -log₁₀[H⁺]

Question 11

What is the Acid Dissociation constant?

Answer 11

Ka = ([H⁺][A^-])/[HA]

Question 12

What is the formula for pK_a?

Answer 12

pK_a = -log₁₀K_a