[CHEM] Unit 12- Equilibrium (eqm)

Question 1

A completion reaction makes:

Answer 1

Gases or precipitates

Question 2

At eqm, rates are:

Answer 2

Equal

Question 3

T/F: At eqm, concentrations are equal

Answer 3

F: At eqm, concentrations are CONSTANT

Question 4

Dynamic eqm is:

Answer 4

When the atoms don’t stop; total amounts don’t change, but the reactions are still occuring

Question 5

What is chemical eqm:

Answer 5

Involves real chemical reactions; makes new formulas

Question 6

Solution eqm only applies to ___ solutions

Answer 6

Saturated

Question 7

At solution eqm, what rates are equal?

Answer 7

The rate of dissolving and the rate of crystallization

Question 8

At solution eqm, if you raise the temp for a gas solute, what happens?

Answer 8

LESS gas is dissolved

Question 9

At solution eqm, if you raise the temp for a solid solute, what happens?

Answer 9

More solute dissolves until a new eqm is reached

Question 10

At phase eqm, what rates are equal?

Answer 10

Rate of freezing=rate of melting

Rate of evaporation/boiling= rate of condensation

Question 11

What is AAA and what does it mean?

Answer 11

Add, Arrow, Away

If something is added/increased, the shift will point away

Question 12

What is RAT and what does it mean?

Answer 12

Remove, Arrow, Towards

If something is removed/decreased, the shift will point towards it

Question 13

(LeChat) What is a stress?

Answer 13

A change in temperature, pressure, or concentration

Question 14

If you add something, where and why does the equilibrium shift?

Answer 14

Shifts away, and because it needs to use up the excess

Question 15

If you remove something, where and why does the equilibrium shift?

Answer 15

Shifts toward, and because it needs to replace what is removed

Question 16

When pressure is changed, what is the shift of the eqm based on?

Answer 16

How many moles of gas there are- BASED ON STATES OF MATTER AND COEFFICIENTS

Question 17

If pressure is increased, what side will the eqm shift to?

Answer 17

The side of lesser moles of gas

Question 18

If pressure is decreased, what side will the eqm sift to?

Answer 18

The side of greater moles of gas

Question 19

What is the common ion effect (adding)?

Answer 19

If you add a different solute that creates on of the ions in the reaction, it is like adding that ion they have in common.

For example, NaCl->(Na+)+(Cl-). You cannot simply add chloride ions, so you add HCL (aq). This will shift the eqm AWAY, and increase the amount of NaCl while decreasing the amount of Na+.

Question 20

What is the common ion effect (removing)?

Answer 20

If you add a different solute that would create an insoluble product with one of the ions in the reaction, it is like removing that ion.

This would shift the eqm towards the removal.