2.5 Solutions and pH

Question 1

What is cohesion?

Answer 1

H bonding between H2O molecules.

Question 2

What is adhesion?

Answer 2

H bonding between H2O and other substances.

Question 3

What is a solvent?

Answer 3

Dissolve solutes creating solvents.

Question 4

What is specific heat?

Answer 4

Amount of energy it takes to heat up Ig of a substance by 1 degree Celsius.

Question 5

What is heat of vaporization?

Answer 5

Energy it takes for 1g of water to evaporate.

Question 6

What is concentration?

Answer 6

The amount of solute over volume

Question 7

What does pH stand for?

Answer 7

Potential of Hydrogen ions.

Question 8

What does pOH stand for?

Answer 8

Potential of Hydroxide Ion.

Question 9

What makes a solution an acid?

Answer 9

The pH is more then 7.
[H3O] > [-OH]

Question 10

What makes a solution an base?

Answer 10

The pH is less then 7.
[H3O] < [-OH].

Question 11

What are the five properties of water?

Answer 11

1. Cohesion and Adhesion
2. Water is the Solvent of Life
3. Ice is less dense than liquid water
4. High Specfic Heat
5. Heat of Vaporization

Question 12

What is the pOH, [H+], and [OH-], when the pH is 8? Is it a base, acid or neutral?

Answer 12

pOH= 6
[H+]=10e-8
[OH-]=10e-6

Question 13

What is the pH, pOH, and [H+], when the [OH-] is 10e-11? Is it acid, base, or neutral?

Answer 13

pH= 3
pOH=11
[H+]= 10e-3

Question 14

What is a buffer?

Answer 14

A reservoir of [H+]

Question 15

What will the buffer do, when the solution gets more acidic?

Answer 15

Buffers absorb the [H+] to make It more neutral.

Question 16

What two ions does water occasionally split into?

Answer 16

Hydroxide and Hydronium

Question 16

What will the buffers do when the solution gets more basic?

Answer 16

Buffers release more [H+] to make it more neutral.

Question 17

Rank the states of matter from most dense to least dense-

Answer 17

Liquid>Solid>Gas