Hydrogen peroxide is used as a cleaning agent in the treatment of cuts and abrasions for several reasons. It is an oxidizing agent that can directly kill many microorganisms; it decomposes upon contact with blood, releasing elemental oxygen gas (which inhibits the growth of anaerobic microorganisms); and it foams upon contact with blood, which provides a cleansing action. In the laboratory, small quantities of hydrogen peroxide can be prepared by the action of an acid on an alkaline earth metal peroxide, such as barium peroxide: What mass of hydrogen peroxide should result when 1.50 g of barium peroxide is treated with 25.0 mL of hydrochloric acid solution containing 0.0272 g of HCl per mL? What mass of which reagent is left unreacted?
Substances in order from most to least dense: He Pentanol Glycerol (more dense because it has more hydrogen bonding than pentanol) Ag Intermolecular vs. Intermolecular forces Intra: Attractions within a molecule between atoms Inter: Attractions between molecules, not nearly as strong as intramolecular forces (which hold compounds together) Types of Intermolecular Forces London Dispersion Forces o Between every molecule, temporary dipoles form between polar and non- polar molecules o Tendency of an electron cloud to distort in this way is called polarizability o Shape of the molecule affects the strength of dispersion forces. Long linear molecules tend to have stronger dispe