Molecules and Molarity Flashcards
What are moles?
the number of moles in a system
What is molarity?
The concentration of something in a system
Note
Molar weight is the same as g if 1 mol
Steps to calculate
1) The weight
2) how many moles
3) how much liquid
The OH- con. is high
it has a high pH (Base)
The OH- con. is low
it has a low pH (acidic)
What can molecules vary in?
1) length
2) branching
3) double position
4) rings (benzene)
What are sugars?
Sugars (carbs)= saccharide
Simple vs complex sugar
Simple: mono & disaccharide like glucose and sucrose
Complex: sugar polymers (polysaccharides) not sweet, starch and cellulose
What is the general carb. formula?
Carbohydrates have a formula of CH20
Why are sugars useful?
Sugar polymers are used for storage of monomers and structural components –> can’t break down starch and glycogen
Characteristics of lipids
High in carbon and hydrogen, low in oxygen, nitrogen and potassium.
- -> hydrophobic
- ->not soluble
What do fatty acids do?
Fatty acids form parts of fats and oils w/glycerol
Saturated?
no double bonds in tail
Unstaturated?
Greater than 1 double bonds in tail
Role of lipids 6?
- energy storage
- insulation and protection
- digestion and absorption
- nutrition (vitamin A,D,K)
- cell membrane structure derived vesicles
- hormone production
Characteristics of DNA
BASE
- rings, nitrogens, phosphate, NH2 carbonal group
Why can we break down starch but not cellulose
The body can’t break down cellulose because the OH in the structures have bee flipped, the human body doesn’t have an enzyme to recognise it.
