2.2 Properties of Water

water molecule

H2O

polarity

oxygen is negative, hydrogen is positive

hydrogen bonds

bonds between oxygen and hydrogen from two DIFFERENT water molecules

cohesion

attraction between molecules of the same substance

adhesion

attraction between molecule of different substances

mixture

two element compounds mixed together, not chemically combined

solutions

solutes dissolved in a solvent

solute

substance being dissolved

solvent

dissolves solute

suspensions

mixtures of water and non dissolved material

pH scale

from 0-14

acids

pH value under 7, creates hydrogen ions when exposed to water (H+)

bases

pH value over 7, creates hydroxyl ions when exposed to water (OH-)

buffers

weak acid/base that react with strong acids/bases to prevent sudden pH change (example: milk)