Water Flashcards
What shape has water got
Distorted tetrahedral/bent shape
What angle has water got
104.5
What are the delta charges on the oxygen and hydrogen
Oxygen has 2delta-
Hydrogen has delta+
Water has what hybridisation
Sp3
In liquid at room temp and atm, molecules are what two things
Disorganised and in continuos motion
Why is ice less dense than water
Ice has 4 hydrogen bonds whereas liquid has 3.4
How does water dissolve crystalline salts
Via hydration
Clusters around the ions and partially neutralises them in turn weakening the electrostatic attractions
What changes are made in the structure of water when there is a non polar amiphatic compound?
Energetically unfavourable changes
Name 3 ways lipids can be arranged in water
Dispersion, clusters and micelles
When lipids are dispersed in water, what happens
Each lipid molecule forces surrounding H2O molecules to become highly ordered
When lipids are clustered in water, what happens as well to entropy
Lipid portions at the edge of the cluster force the ordering of water. Entropy is increased as fewer water molecules are ordered
When lipids form micelles in water, what happens
Hydrophobic groups are sheltered from water.
Ordered shell of water molecules is minimised, entropy is increased even more.
Release of water favours formation of what
Enzyme substrate complex
Increase in entropy as enzyme and substrate bind provides what
Thermodynamic push towards complex formation
