LAB 1: WATER PROPERTIES Flashcards
what shape is water?
tetrahedral shape
sharing of electrons between atoms is fairly equal, and the covalent bond is
nonpolar
electrons are not equally shared
polar
the oxygen end
electronegative
hydrogen end
electropositive
attraction between a hydrogen atom
hydrogen bond
occurs when molecules of different substances are attracted to one another and cling together
adhesion
water clings
hydrophilic
repel water
hydrophobic
occurs when molecules of the same substances are attracted to one another and cling together
cohesion
because water molecules are COHESIVE, they cling together, making the surface of the water difficult to break through
surface tension
water molecules climbing up a tube
capillary action
hydrophilic substances that are porous will often soak. up water by capillary actions and swell in the process: beans
inhibition
resistant to temperature change
high specific heat
the change from a liquor to a gas
vaporization
water is an excellent _________ _______. when a liquid evaporates from a surface it carries heat away from the surface
evaporative coolant
the substance present in greater amounts
solvent
the substance present in lesser amounts
solute
what substances dissolve
salt and sugar
which is an electrolyte
salt
ions released into solution can conduct an electric current
electrolytes
are substances that dissociate in water and release additional H+ into the solution
acids
substances that remove hydrogen ions from the solution
bases
Examples of bases
bleach, baking soda, ammonia
Examples of acids
HCL, vinegar, coffee
