Cheese exam 1

Question 1

What is the octet rule?

Question 2

Which atoms are exempted from the octet rule?

Question 3

Sigma and pi bonds

Answer 3

Single bond = 1𝛔
Double bond = 1𝛔 +1𝛑
Triple bond = 1𝛔 + 2𝝿

Question 4

What is molality?

Answer 4

molality=(mol solute)/(kg solvent)

Question 5

What is i?

Question 6

Boiling point Elevation Equation

Answer 6

ΔT_b=im(k_bp)

Question 7

If the change in deltaT_b is needed to convert to Celsius..

Answer 7

add 100 to deltaT_b

Question 8

Henry’s Law Equation

Answer 8

C=kP ; k is a constant and P is pressure

Question 9

Freezing point depression equation

Answer 9

delta(T_f) = im(k_f)

Question 10

The i of a non-electrolyte is

Answer 10

1

Question 11

molar mass

Answer 11

MM = mass / mol

Question 12

Molarity Equation

Answer 12

Molarity (M) = moles of solute (n) / L of solution

Question 13

percent by mass

Answer 13

22.3% = (22.3 g solute)/(100 g of solution)

Question 14

If a solid is IONIC -> will have polar bond –> dissolve in polar solvent

Answer 14

If a solid is COVALENT -> will have NP bond -> dissolve in NP solvent

Question 15

Polar Bond examples

Answer 15

O-H

Question 16

Non polar bond examples

Answer 16

C-H

Question 17

The rate law is equal to what step?

Answer 17

The slow step

Question 18

The rate law only includes what?

Answer 18

reactants

Question 19

amt/t = con/t = ___ rate law

Answer 19

integrated rate law

Question 20

Integrated rate law second order

Answer 20

1/[A] = kt + 1/[A]o

Question 21

Second order units

Answer 21

M^-1 s^-1

Question 22

unit for order reaction equation

Answer 22

units = M^1-n time^-1

0 order M^1s^-1
1 order M^0 s^-1 =s^-1
2 order M^-1s^-1
3 order M^-2 s^-1

Question 23

What is Kc (equilibrium constant)?

Answer 23

the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients
no solids or liquids

Question 24

How to know if a graph is showing an exothermic reaction?

Answer 24

It is showing an exothermic reaction if the potential energy is higher on the reactants side than the products side.

Question 25

Q and K relationship

Answer 25

Q > k reaction will go to the left
Q < k reaction will go to the right

Question 26

Kp formula

Answer 26

Kp = kc(RT)^(delta)n
where R is 0.0821 Latm/molk
(delta) n = mol of prod - mol of reactants