Chemistry Equilibrium Flashcards Preview

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Flashcards in Chemistry Equilibrium Deck (35):
1

What is the formula for equilibrium?

Kq = products / reactants.

2

What are some rules to think about when it comes to creating the equilibrium formula?

1. coefficients become exponents.
2. Don't include pure liquids or solids.
3. Keq only changes due to temperature.

3

How does a catalyst effect equilibrium?

Catalysts effect the kinetics of a reaction, NOT the equilibrium.

4

Compare Reaction Quotient and Equilibrium Constant.

If the Equilibrium Constant is greater than the Reaction Quotient then there are a lot of reactants, therefore the reaction will shift to the right.

If the Equilibrium Constant is less than the Reaction Quotient then there are a lot of products, therefore the reaction will shift to the left.

5

1 mole at stp equals:

22.4 L. 760 torr. 1 atm. 101k Pa. 0 degrees celcius.

6

What is the common ion effect?

Common ion effect says the solubility of the solid will decrease due to the actions of the Le Chatelier's Principle. If there is a common ions, then the reaction will go in the opposite direction creating more solid making it less likely to dissolve. `

7

Le Chatelier's Principle Rules:

1. Adding heat will make the reaction go forward, EXCEPT when you have an exothermic reaction, - delta H, in which case the reaction will go left with the addition of heat.

2. The direction of the reaction will follow volume. Volume is inversely related to pressure.

8

Explain Acid/ Base solubility

Due to the common ion effect, acids are more likely to be soluble in bases & bases are more likely to be soluble in acids.

9

What do you do if you're give ksp and asked to solve for molarity?

Use the long formula with all the coefficients and exponents.

10

What do you do if you're given M and asked to solve for ksp?

Use the shortcut without the coefficients.

11

How do you solve common ion problems?

The concentration given, is the concentration for the solute. X is negligible so don't worry about it, then solve for ksp. Remember the ksp should be lower than normal.

12

Acetate

C2H3O2-

13

Bicarbonate

HCO3-

14

Bisulfite

HSO3-

15

Bisulfate

HSO4-

16

Dihydrogen phosphate

H2P04-

17

Hypochlorite

ClO-

18

Chlorite

ClO2-

19

Chlorate

ClO3-

20

Perchlorate

ClO4-

21

Cyanide

CN-

22

Hydroxide

OH-

23

Superoxide

O2-

24

Nitrite

N02-

25

Nitrate

NO3-

26

Permanganate

MnO4-

27

Carbonate

CO3^2-

28

Chromate

CrO4^2-

29

Dichromate

Cr207^-2

30

Hydrogen phosphate

HPO4^2-

31

Oxide

0^2-

32

Peroxide

02^2-

33

Sulfite

so3^2-

34

Sulfate

So4^2-

35

What affects the equilibrium constant?

Temperature. Keq is evaluated at a certain temperature.