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Bio - Water

i hate everything school suckssss

QuestionAnswer
Water molecule composed of hydrogen and oxygen that fills our cells, allows for transport of substances in the body
Polar molecule molecule with regions of positive and negative charge
Oxygen Atom (in water) region of a water molecule that is negatively charged
Hydrogen Atoms (in water) regions of a water molecule that are positively charged
Capillary action ability of water molecules to creep up surfaces due to their polarity (e.g., up plant stems, meniscus in a graduated cylinder)
Hydrogen bonds attractive force between a positively charged hydrogen of one molecule and a negatively charged atom of a different molecule
Solution mixture in which one or more substances (solutes) are distributed evenly or dissolved in another substance (solvent)
Solvent substance in which a solute is dissolved
Solute substance being dissolved in a solvent
pH scale used to measure of how acidic or basic a solution is; ranges from 0 - 14
Acid substances with a pH less than 7; any substance that forms hydrogen ions (H+) in water
Base substances with a pH greater than 7; any substance that forms hydroxide ions (OH-)
Hydrogen ions H+; high concentration in acids
Hydroxide ions OH-
Cohesion Attraction between molecules of the same substance
Adhesion An attraction between molecules of different substances
Surface Tension A measure of how difficult it is to stretch or break the surface of a liquid
Specific Heat The amount of thermal energy needed to raise the temperature of 1 g of a material by 1°C.
Heat of Vaporization The heat a liquid must absorb for 1 g to be converted to gas.
Evaporative Cooling Cooling that results from evaporation of a liquid (e.g., sweating cooling the body down)
Frost Wedging Process that splits rock when water seeps into cracks, then freezes and expands
Aqueous Solution A solution in which the solvent is water
Buffer Compound that prevents sharp, sudden changes in pH by binding or releasing H+
Carbonic Acid Weak acid formed in solution when carbon dioxide dissolves in water; important buffer in blood.
Bicarbonate Weak base formed when a H+ ion is released from carbonic acid; important buffer in blood
Transpiration The process by which water is lost through a plant's leaves and then water is drawn up through the roots
CO2 in water Forms Carbonic Acid, which dissociates into bicarbonate and H+, making the water more acidic
Water molecules bonding because of its polarity Hydrogen bonds
Polar covalent bond a strong bond where electron sharing between atoms is unequal, resulting in one atom being relatively negatively charged and the other relatively positively charged
Bond between hydrogen and oxygen in water polar covalent bond
Created by: killjoy <3
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