Exam 1 Lecture 4 Flashcards Preview

BIO 1510 Exam 1 > Exam 1 Lecture 4 > Flashcards

Flashcards in Exam 1 Lecture 4 Deck (16)
Loading flashcards...
0

True or False? Water has a HIGH specific heat and a LOW heat of vaporization?

False. High, high

1

True or false? Solid water is less dense than liquid water.

True

2

Water is a __________ solvent.

Good

3

What is Hydrophobic?

"Water-fearing"

4

What is Hydrophilic?

"Water-loving"

5

Water causes __________ molecules it aggregate or assume specific shapes.

Hydrophobic

6

The concentration (pH) of Hydrogen ions is __________ mol/L

10^-7 (7)

7

__________ is the negative logarithm of hydrogen ion concentration of solution.

pH

8

If the [H^+] (Hydrogen ion concentration) is 10^-9 mol/L, what is the pH?

9

9

What is the pH of stomach acid? (Hint: very acidic!)

2

10

If the pH is 2, what is the [H^+]?

10^-2 mol/L

11

An __________ is a substance that dissociates in water to increase the [H^+] (lowers the pH).

Acid

12

What is a Base?

A substance that has a lower [H^+] (higher pH).

13

_________ are substances that reduce changes in pH.

Buffers

14

Buffers __________ H^+ when a base is added and __________ H^+ when acid is added.

Release, Absorb

15

In an ION, the number of __________ is always different from the number of __________.

Protons, Electrons