Bio Test: Chapter 2

Question 0

Two trace elements

Answer 0

Iron magnesium

Question 1

What are the 4 most abundant elements

Answer 1

CHON carbon hydrogen oxygen nitrogen

Question 2

What’s the reductionist approach?

Answer 2

Looking at parts and studying them to understand the whole

Question 3

What’s an acid?

Answer 3

Substance that donated h+

Question 4

What’s a base?

Answer 4

A substance that received h+

Question 5

What is the ph scale and how is it broken down?

Answer 5

Shows the acidity of a substance. 1-6 acidic, 7 neutral, 8-14 Basic

Question 6

Purpose of parts in lab?

Answer 6

1- classify diff sub as base or acid
2- notice buffers
3-household items as buffers

Question 7

If you wanted to reduce the ph of a solution you would..

Answer 7

Add a buffer to release h+ ions into the solution

Question 8

Adding a base to the solution will

Answer 8

Raise the ph and descrease the hydrogen

Question 9

What solutions have the greatest concentration of hydroxide ions?

Answer 9

Basic solutions

Question 10

Which has the greatest concentration of hydrogen ions?

Answer 10

Acid substances

Question 11

What’s a solution with water as the solvent?

Answer 11

Aqueous

Question 12

An ion is formed when

Answer 12

An atom loses or gains electrons

Question 13

Smallest particle of water

Answer 13

Molecule

Question 14

Ice floats b/c

Answer 14

Water molecules farther apart than in liquid water

Question 15

What’s the smallest in volume?

Answer 15

Proton

Question 16

Why does sugar mix with water and oil does not?

Answer 16

Sugar has ionic bond which water can dissolve but can’t dissolve a covalent bond or things without charge.