Transcript WARM UP 9/24

WARM UP 9/24
1.
2.
3.
What biomolecule’s building blocks are…
a. Nucleotides
b. Amino acids
c. Saccharides
d. Acids and bases
e. Fatty acids and glycerol
Name 2 types of bonds.
3 functions of salt.
ACIDS AND BASES
Have your chart out to add on these
biomolecules
ACIDS- compound that gives off
H+ ions
ELEMENTS:
Hydrogen + a metal
BUILDING BLOCKS:
none
FUNCTION:
1. Break down foods
2. Fight against germs
BODY:
Stomach (HCl)
Acetic acid
Carbonic acid
FOODS:
Citrus fruits
Milk
Alcohol
Spicy foods
BASES – compound that gives
off OH- ions
ELEMENTS:
Oxygen
Hydrogen
plus metal
BUILDING BLOCKS:
None
FUNCTIONS:
1. Protect tissues from
acids
BODY:
Digestive tract
(bicarbonate)
FOODS:
Leafy vegetables
Baking soda
NOTES Ch 2 9/24
ACIDS AND BASES
pH Scale
Measures the
concentration of H+
ions in a solution
Ranges from 0 – 14
0 end acidic
7 neutral
14 end basic
(alkali)
Every step up = 10 times more
EX: pH 3 and pH 8 =
5 (10)
, so pH3 is 50 times more acidic than pH8
or pH8 is 50 times more basic than pH3
LITMUS PAPER
Used to test pH
Will turn color in presence of an acid or base
ACID EX:
HCl ------- H+ +
Cl-
BASE EX:
NaOH ------ Na+ + OH-
ACID + BASE
HCl + NaOH ------ NaCl +
?
H2O
= SALT + WATER
(H+ and OH- = H2O)
acid
base
ACID BASE BALANCE
Cells VERY sensitive to
changes in body pH
Blood 7.4
Acidosis < 7.4
Alkinosis > 7.4
Lungs important in
balance
HOMESTATIS OF ACIDS AND BASES
Decrease breathing
Increase CO2
Formation of carbonic
acid
blood pH acidic
Increase breathing
Decrease CO2
blood pH back
TODAY
ACID – BASE LAB
Read all directions
Do not spill!
Do not smell directly!
Make sure to clean up, points for it
NEED: something to write with, today’s notes