Water Flashcards
Water Molecule
A polar (+ and - charges arranged so as to have directional pull) covalently bonded compound contains 2 Hydrogens and 1 Oxygen
Sucrose + Water =
molecular state
Salt + Water
Ionic State
Dielectric Constant measures
the relative effect of the medium on the force with which two oppositely charged plates attract each other
Structure of Ice
Tetrahedral hydrogen bonding around a water molecule
*What instrument is used to determine the calorie of foods
Bomb Calorimeter
Forms of water
Liquid, Solid, Gas
Molecular Weight of Water
18
Electron Arrangement: Water
Electrical asymmetry
No overall net charge
Electrical dipole
pH =
-log[H+]
Water Activity
how much water is readily available to cause a chemical reaction
Non-polar molecule
electrically neutral: contains an equal amount of +/- charges
Surfactant
reduces surface tensions
All molecules attract due to
London Dispersion Forces
Dipole-ion Interactions
+ Solutes
+ Proteins
Dipole-dipole Interactions
+ Protein
+ Carbohydrates
SCFE
Super Critical Fluid Extract
Sublimation
Solid (ice) changes to gas (vapor)
Archimedes Theory
Water Displacement
Molar system [M]
the gram molecular (1 mole) weight of solute in a liter of a solution
Molal system [m]
the gram molecular weight of solute in 1 kg of solvent
Percent by weight
the grams of solute present in 100g of solution (w/w)
Percent by volume
the grams of solute in 100ml of solutions (w/v)
Normal system [N]
the gram equivalent weight of a material in 1 L of solution
Normality
how many hydrogen are available for a chemical reaction
