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