mole fraction
This podcast explains the concept of a mole fraction. It is designed to follow the podcast on partial pressure
partial_pressure
This video explains Dalton's Law of Partial Pressures and describes its application in collecting gases over water. It can be followed up with the video about mole fractions.
Kg_has_a_weight_problem
This 8/20/09 story discusses the problem with having a physical standard (like the kilogram) instead of a calculated standard (like the meter).
acid_base_part_1
This video explains what an electrolyte is. It explains the similarities and differences between acids and bases and between strong and weak species. Students can practice writing net ionic equations of acids & bases dissolving in water.
