Chem 131: ch 4: stoichiometry and molecular reactions/ molarities and solutions. Combustion reaction balancing: balance carbons, balance h, balance o. Limiting reagent: specific reagent that limits a reaction: balance reaction, convert to mol, multiply by ratio. Concentrated solution: a lot of solute in solvent. Concentration: # of moles solute / total volume. Aqueous means water is the solvent: water is a polar molecule. Saturated: a solution cannot dissolve any more solvent. Like dissolves like : nonpolar dissolve nonpolar, vice versa. Electrolyte: anything that ionizes in solution to cause electricity to be conducted. Will conduct electricity but not as well as nacl because of ionization of the h. Molecular equation: net ionic equation vs molecular equation. Acid base reactions: acid + base h2o + salt. Neutral solution: # of mol acid = # of mol base. Combustion: cxhy + o2 co2 + h2o. Precipitation: ab + cd ad + bc.
