Ch 6: Postmortem and pH shift

Question 1

Properties of Acids

Answer 1

Sour taste
Turns litmus paper red
Can exist in all 3 states

Question 2

Properties of Bases

Answer 2

Bitter taste
Turns litmus paper blue
Found in all physical states

Question 3

Which theory: in water acids are substances that produce hydrogen ions & bases produce hydroxide ions

Answer 3

Arrhenius thory

Question 4

Which theory: acid’s a substance that donates a hydrogen proton to any substance
“Proton donor”

Answer 4

Bronsted-Lowry theory

Question 5

Which theory:
Acid is anything that accepts a pair of electrons
Base is anything that donates pair of electrons

Answer 5

GN Lewis theory

Question 6

Substance that can act as an acid or base

Answer 6

Amphoteric

Question 7

Molecule with a separate positive and negative charge

Answer 7

Zwitterion

Question 8

pH7 is ____. <pH7 is ____.
>pH7 is ____.

Answer 8

Neutral / acidic / basic

Question 9

What is the pH during life?

Answer 9

~7.4

Question 10

pH becomes what immediately after death?

Answer 10

Acidic

Question 11

pH becomes what after several hours after death?

Answer 11

Basic

Question 12

What helps overcome pH differences by keeping pH at a subtle range?

Answer 12

Buffers

Question 13

Optimal pH range for formaldehyde

Answer 13

7.3-7.5

Question 14

All the replaceable hydrogen of corresponding acid has been replaced by metal

Answer 14

Normal salt

Question 15

Only part of the replaceable hydrogen of the acid has been replaced by metal

Answer 15

Acid salt

Question 16

Contains a metal and one or more replaceable hydroxide ions

Answer 16

Basic salt

Question 17

Dissociating of substance into ions

Answer 17

Ionization

Question 18

Passage of an electrical current through a solution

Answer 18

Electrolysis