Unit 2&3 CHEMISTRY

Question 1

pH
&
pH Scale

Answer 1

A measure of how acidic a solution is

x < 7 = Acidic
7 = Neutral (Pure Water)
x > 7 = Basic

Question 2

BUFFER

Answer 2

Compounds that help maintain pH

Question 3

IONS

2 TYPES

Answer 3

Are any atom or molecule w/ a charge

Cations (+) charge
Anions (-) charge

Question 4

SALTS

Answer 4

Combining a Cation & Anion gives you salt

Salts typically dissolve in water

Question 5

SALTS THAT DISSOLVE IN WATER

Answer 5

Electrolyte because it can conduct electricity

Question 6

MEMBRANE POTENTIAL

Answer 6

Separating Ions across a Cell Membrane causes a Membrane Potential (Voltage) to form

Question 7

DIFFUSION

Answer 7

Passive movement of Atoms or Molecules down a concentration gradient (spread out)

(WATER FOLLOWS SALTS)

Question 8

OSMOSIS

Answer 8

High concentration to low concentration

Question 9

TONICITY

3 TYPES

Answer 9

Cells in a solution

HYPERTONIC - Very salty/sugary (cell shriveled)

ISOTONIC - Stays the same (Normal)

HYPOTONIC - Less salty/sugary (cell swells/burst)