Hydrogen Bonding Flashcards
VSEPR Theory
Election pairs adopt positions where their mutual interactions are minimized
Bonding pairs
Involved in bonding, bond angle occurs between them and they occupy a small space
Lone pairs
Not involved in bonding and they occupy more space
Water molecular structure
Tetrahedral with 2 hydrogen atoms and 2 lone pairs
Conformations
Shapes of big molecules that change according to interaction with solvent
Why is water a good solvent?
It is dipolar and it forms hydrogen bonds
Hydrogen bond
Weak bond occurs when oxygen partially shares a lone pair with hydrogen
Ice structure
Water molecules form six member rings that join to form large open molecules
Density
It increases on melting
Physical properties of water
Has high boiling point, melting point, cohesive energy, and heat capacity
Heat capacity
Amount of heat required to raise the temperature of 1g of substance by 1 degrees C
Surface tension
Force at surface that opposes an increase in surface area which minimizes the degree of contact between water and air
Layers of water
Inner hydration shell, outer hydration shell, and bulk water
Self assembly
Caused by hydrophilic and hydrophobic tendencies of molecules
Liposomes
Drug delivers system that are used to deliver vaccines, can have a hydrophobic or a hydrophilic load
