Chapter 2- Nature Of Molecules And Properties Of Water Flashcards
Valence electrons
Electrons in the outermost energy level of the different elements
Covalent bond
Sharing of electron pairs
Form when two atoms share one or more pairs of valence electrons
Ionic bond
Attraction of opposite charges
Hydrogen bond
Sharing of H atom
Bonds form between the partially negative O atoms & the partially positive H atoms of 2 water molecules
Hydrophobic interaction
Forcing of hydrophobic portions of molecules together in presence of polar substances
Organic compounds
The majority of molecules that make up your body ; compounds of Carbon
Chemical reaction
Formation and breaking of chemical bonds
Cohesion
Hydrogen bonds hold water molecules together
High specific heat
Hydrogen bi de absorb heat when they break and release heat when they form, minimizing temp changes
High heat of vaporization
Many hydrogen bonds must be broken for water to evaporate
Lower density of ice
Water molecules in an ice crystal are spaced relatively far apart because of hydrogen bonding.
Solubility
Polar water molecules are attracted to ions and polar compounds making these compounds soluble
pH
Power of hydrogen
Ph less than 7
Acidic
Ph greater than 7
Basic
