CALCULATING EMPIRICAL FORMULAS
Convert % composition by mass to grams of element.
% of element (in decimal form) x 100g compound = grams of element
Calculate the number of moles of each element in the compound and express
this as a molar ratio.
All acids are soluble. Ammonia is soluble.
All Na+, K+, and NH4+ compounds are soluble.
All nitrates and acetates are soluble.
All chlorides are soluble except AgCl and Hg2Cl2; PbCl2 is only slightly soluble. All
bromides are soluble exce
Naming Ionic Compounds
Compounds are electronically neutral.
The name of the metal (cation) is given first a Roman numeral indicating the
charge is placed in parenthesis for those metals who commonly form more
than one ion. (transition
Determining Number of Significant Figures
All non zero numbers are significant
Zeros between nonzero numbers are significant
When a decimal point is shown, zeros to the right of nonzero figures are
When a decimal point is