chem 120 exam 2

precipitation reaction

A reaction in which a solid, insoluble product forms upon mixing two solutions.

neutralization reaction

a reaction in which an acid and a base react in an aqueous solution to produce a salt and water

redox reaction

A chemical reaction involving the transfer of one or more electrons from one reactant to another; also called oxidation-reduction reaction.

percent yield

actual yield/theoretical yield x 100

parts per million

g solute/L solution

parts per billion

micrograms of solute/kg of solution

mass per volume

grams solute/100 mL of solution

enthalpy

The heat content of a system at constant pressure

oxygen has a charge of 2- except when

in elemental form, as peroxide, or OF2 (O has a charge of 2+)

halogens are mostly 1- except

when with oxygen or other halogens with higher electronegativity

first law of thermodynamics

the energy of the universe is constant