Chapter 2: Section 2.4c, 2.5, 2.6: Water as the Universal Solvent

Question 1

Define amphipathic molecules

Answer 1

Substances that partially dissolve in water

Question 2

Define Buffers

Answer 2

Help prevent pH changed if excess acid or base is added

Question 3

Define Neutralization

Answer 3

Occurs when an acidic or basic solution returned to neutral

Question 4

Define Suspension

Answer 4

Occurs when material larger in size than 100 nanometers mixed with water. A suspension does not remain mixed unless in motion. Scatters light, turbid appearance

Question 5

Define Emulsion

Answer 5

A suspension specifically composed of water and a nonpolar liquid such as vegetable oil, that mix on when agitated.

Question 6

Define Colloid

Answer 6

A mixture compose of protein within where the portein ranged in size from 1-100 nanometers, Remains mixed when not in motion. Scatters light

Question 7

Define Solution

Answer 7

A homogeneous mixture in which the substance is smaller than 1 nanometer and it dissolves in water. Remains mixed when no in motion and solute is not seen. Scatters light

Question 8

Define Molarity

Answer 8

Solute/Liter
Alters with changes in temperature
Easy to measure

Question 9

Define Molality

Answer 9

Solute/Kilogram
Does not alter with changes in temperature
Difficult to measure

Question 10

Define Osmoles

Answer 10

The unit of measurement for the number of particles in a solution.

Reflects whether a substance dissolves OR dissolves AND dissociates when placed into a solution