LEC 5

Question 1

What is Biochemistry?

Answer 1

The chemistry of life

Question 2

List the 2 types of compounds?

Answer 2

1. Organic
2. Inorganic

Question 3

What is inorganic compounds?

Answer 3

Does not contain carbon bonded to hydrogen

Question 4

What is organic compound?

Answer 4

Has carbon bonded to hydrogen (C6 & H2)

Question 5

What are the 4 important compounds in the human body?

Answer 5

1. Water
2. Acids
3. Bases
4. Salts

Question 6

What types of solutes can water dissolve?

Answer 6

Hydrophilic solutes (water loving)
(Polar covalent bonds)

Question 7

What types of solution can’t be dissolved in water?

Answer 7

Hydrophobic (water hating)
Non-polar molecules- oils, fats

Question 8

What’s are acids?

Answer 8

Hydrogen ion donor

When acid is placed in water - Hydrogen donates electrons - INCREASE

Question 9

Give one example of an acid in the body?

Answer 9

Hydrochloric acid (HCl)

Question 10

What are base?

Answer 10

Hydrogen acceptor

When a base is mixed in water - hydrogen ions DECREASES

Question 11

What is a pH scale?

Answer 11

Represent hydrogen ion concentration in solution

Goes from 0-14

Question 12

TRUE OR FALSE

1.The more hydrogen ion solution the lower the pH

2. The fewer the hydrogen ion the higher the pH

Answer 12

1. TRUE
2. TRUE

Question 13

Give examples of Neutral substances?

Answer 13

Water, blood, milk

Question 14

What is Buffer?

Answer 14

-Maintains normal blood PH (7.4)
-Chemical system - prevent large change in pH

-increase or decrease pH to maintain 7.4 pan level

Question 15

What is the normal blood pH value?

Answer 15

Blood pH = 7.4

Question 16

What is salt?

Answer 16

Metal + non-metal joined by ionic bond.

Metal cation and non-metal anion joined by ionic bonds

Note: salt is the major component of the bones and teeth

Question 17

TRUE OR FALSE

1. From 1-5 is acidic with (1) being the strongest and 7 the weakest?

2.When the pH goes down it’s Acidic?
3.When the pH goes up it’s base?

Answer 17

ALL TRUE!

Question 18

TRUE OR FALSE

Every number on the scale changes by 10 fold?

Answer 18

TRUE

Question 19

TRUE OR FALSE

(1). 1 on the pH scale is more acidic than 6?

(2) 1 is stronger than 3 how many times?

Answer 19

1. TRUE
2. 100x (always multiple each space(fold) by 10)