A student wants to prepare 1.00 L of a 1.00 M solution of NaOH (molar mass 40.00 g/mol). If solid NaOH is available, how would the student prepare this solution? If 2.00 M NaOH is available, how would the student prepare the solution? To help ensure three significant figures in the NaOH molarity, to how many significant figures should the volumes and mass be determined?
Bronsted-Lowry/Lewis Acids & Bases Bronsted-Lowry definition • —acid: H+ donor —base: H+ acceptor • Lewis definition —acid: electron acceptor —base: electron donor • H+ attaches to H2O to form a hydronium H3O+ ion • strong acids and bases completely dissociate in water and have huge K values • weak acids and bases partially dissociate in water • important strong acids —HCl —HBr —HI —HNO3 —HClO4 —H2SO4 • important strong bases —LiOH —NaOH —KOH —Ca(OH)2 —Ba(OH)2 —Sr(OH)2 • conjugate acid - add one H+ —ex. conjugate acid of H2O is H3O+ • conjugate base - remove one H+ —ex. conjugate base of H2O is OH- Structure, Acidity/Basicity, & pH • ex