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Chp. 2 bio

Water and the fitness of the Environment

QuestionAnswer
Polarity of water molecules result in hydrogen bonding
Water is Cohesive they stick to each other.
Capillary action water molecules can pull other water molecules along with them, even against the force of gravity.
Surface tension is a measure of how hard it is to break the surface of a liquid. Ex. not being heavy enough to disrupt hydrogen bonds to float.
high specific heat it takes a lot of energy to change temp of water.
Water is a good solvent
Solvent is a substance present in a larger amount in a solution
solute is a substance present in smaller amount in a solution
solution is a solute + solvent.
Polar ionic compounds dissolve in water. allows them to move around and react with other molecules in cells
Hydrophilic water loving
Hydrophobic water fearing
Nonpolar molecules will not dissolve and instead tend to cluster together. cell membranes.
ph scales measures the concentrations of H+ ions in a solution
acidic ph of 1 to 6.9 is acidic. hydrochloric acid, vinegar, lemon juice,
neutral ph 7
basic (alkaline) ph of 7.1 - 14 is basic. common bases include ammonia, bleach, oven cleaner.
Buffer is a solution that resists change in pH, blood contains many buffers. ph 7.4
Antacids are buffers that are used to maintain stomach acid at the right level.
Created by: 1574238891
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