Water Flashcards
Hydrophilic
Bond to water
Do not bond to Water
Hydrophobic
Water characteristics
High specific heat
Cohesion/ adhesion
Solvent
Surface tension
Solvent
The ability of dissolving other polar molecules
Sphere of hydration
Molecules surround the compound ( what happens during saturation)
Atoms or groups break off and form ions
Disassociation
Surface tension
The ability to withstand rupturing when placed under tension
Percentage of Hydrogen
-7 acidic
7 neutral
+7 alkaline
Human is 7.35-7.4
PH
Base
Decrease the amount H+ ions present
Acid substance
Increases the amount H+ ions present
Water specific heat
One calorie to heat
Highest off all molecules
586 cal to break heat energy to break the hydrogen bonds
Buffer
Homeostasis to ensure that acidic levels are normal
Water molecules expand and become less dense.
Why does ice float
Why does water racists change
The specific heat. Water resist change because it’s temperature is high of specific heat.
High specific heat because of hydrogen bonding
Evaporative cooling
Helps stabilize temperature in organisms and bodies of water
Heat of vaporization
Transfer of a substance from liquid to gas.
Amount of heat that a liquid must absorb for 1g to be converted
Solution
Liquid that is completely homogenous mixture of substances
Aqueous solution
Water is the solvent of a solution
Cohesion of water
Collectively hydrogen bonds hold water molecules together -Cohesion
Adhesion
An attraction between different substances for example between water and plant cell walls
Why does ice float
Hydrogen bonds are more ordered when frozen making ice less dense
Water reaches greatest density at 4•Celsius
Do strong acids and strong bases disassociate completely in water
Yes
pH = -(-7)=7
10^-7 neutral
What type of bond is water?
What type of molecule is it and why?
Covalent bond and polar molecule.
The hydrogen and oxygen share electron.
The hydrogen spends more time with the oxygen.
