2.2

Question 1

Hydrogen Bonds

Answer 1

Weak attraction between a hydrogen atom and another atom.

Example sentence: Water molecules are held together by hydrogen bonds.

Question 2

Cohesion

Answer 2

Attraction between molecules of the same substance.

Question 3

Adhesion

Answer 3

Force of attraction between different kinds of molecules.

Question 4

Mixture

Answer 4

Material composed of two or more elements or compounds that are physically mixed together but not chemically combined.

Question 5

Solution

Answer 5

Type of mixture in which all the compounds are evenly distributed.

Question 6

Solute

Answer 6

Substance that is dissolved in a solution.

Question 7

Solvent

Answer 7

Dissolving substance in a solution.

Question 8

Suspension

Answer 8

Mixture of water and non-dissolved material.

Question 9

PH Scale

Answer 9

Scale with values from 0 to 14, used to measure the concentration of H+ ions in a solution; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a pH of 7 to 14 is basic.

Question 10

Acid

Answer 10

Compound that forms hydrogen ions (H+) in solution; a solution with a pH of less than 7.

Question 11

Base

Answer 11

Compound that produces hydroxide ions (OH-) in solution; solution with a pH of more than 7.

Question 12

Buffer

Answer 12

Compound that prevents sharp, sudden changes in pH.