properties of water & pH

Question 1

unequal distribution of electrical charge

Answer 1

polarity

Question 2

_____ is a polar compound.

Answer 2

water

Question 3

polarity of water allows water to act as a ______.

Answer 3

universal solvent

Question 4

weak attractions between a negative and positive pole of H20 molecules

Answer 4

Hydrogen Bonding (H-Bond)

Question 5

ATTRACTIVE force that HOLDS molecules of a single substance together

(water molecules bond with one another)

Answer 5

cohesion

Question 6

attractive force between two particles of different substances

(water molecules stuck to other surfaces)

Answer 6

adhesion

Question 7

makes surface of water somewhat hard

Answer 7

surface tension

Question 8

ability to move upward through narrow tubes against the force of gravity

Answer 8

capillarity

Question 9

“water loving” compounds - charged molecules like ionic and polar compounds

Answer 9

hydrophilic

Question 10

“Water Hating” compounds - uncharged molecules such as non-polar molecules

Answer 10

hydrophobic

Question 11

2 or more substances mixed together but not chemically combined

Answer 11

mixture

Question 12

one or more substances that are evenly distributed in another substance

Answer 12

solution

Question 13

all solutions contain a _____ and ______.

Answer 13

solute; solvent

Question 14

substance being dissolved

Answer 14

solute

Question 15

substance in which the solute dissolved

Answer 15

solvent

Question 16

particles spread through a liquid or had but settle out over time

Answer 16

suspension

Question 17

mixtures with properties between those of a solution and a suspension

Answer 17

colloid

Question 18

pH stands for _______ ________.

Answer 18

potential hydrogen

Question 19

Range from 0-14:

0-6 = _____.

7 = _____.

8-14 = _____.

Answer 19

acid; neutral; base

Question 20

compound that releases hydrogen ions (or hydronium ions) when dissolved in water

Answer 20

acid

Question 21

Characteristics of Acids

Answer 21

• Taste sour
• Corrosive
• Contains hydrogen ions when dissolved in water
• pH less than 7

Question 22

compound that releases hydroxide ions when dissolved in water

Answer 22

base

Question 23

Characteristics of Bases

Answer 23

• Taste bitter
• Slippery
• Contains hydroxide ions when dissolved in water
• pH greater than 7

Question 24

• Chemicals that help to neutralize pH
• Regulate by soaking up or releasing hydro ions from a solution

Answer 24

Buffers

Question 25

Why is it important for cells and organisms to buffer solutions against rapid changes in pH?

Answer 25

To maintain Homeostasis

Question 26

• Allows for the regulation of Earth’s temperature

• Allows organisms to regulate body temperature

Answer 26

Temperature Moderation