Life is Based on Water
water has a high specific heat
amount of energy required to raise the temp of 1 gram of a substance by 1 degree celcius
2 dissociated water molecules create
hydronium and hydroxide
polar water molecules are very good at hydrogen bonding?
true
water is a good solvent
true
water resists changes to its surface area
true
hydrophobic
water fearing
products
what comes out of a chemical reaction
molarity
when substance is dissolved in a solvent, its concentration is expressed as
non-polar molecules dissolve in water
false
liquid water is more dense than solid water
-ice floats -due to hydrogen bonding and the shape of a water molecule -allows frozen water sources to act as an insulating layer instead of sinking to the bottom (without it Earth's water would be frozen)
4 Essential Features of Water
-polar solvent -adhesive and cohesive -liquid water is more dense than solid water -high capacity for absorbing heat
solvent
A liquid substance capable of dissolving other substances
surface tension
A measure of how difficult it is to stretch or break the surface of a liquid
reactants
What goes into a chemical reaction
pH
baseed on the concentration of protons in the solution
wild swings in water temp
calls for worry
acid
compounds that give up a proton and raise the hydronium concentration in water (high concentration of hydrogen)
base
compounds that take a proton and lower that hydronium in water (low concentration of hydorgen)
water has high heat of vaporization
energy required to change 1 gram of water from a liquid to a gas
cohesion
likes to stick to itself (water will hydrogen bond with other water molecules)
adhesion
likes to stick to other things (water will hydrogen bond with any polar molecule)
living near large bodies of water
makes temps moderate and don't change much, water absorbs heat (LA always being around 70 degrees)
solute
molecules that dissolve in solvent
Hydrophilic
molecules that dissolve well in water
unique bent structure of water molecule
one side is slightly negative, one side is slightly negative