HideShow resource information
Preview of Equations

First 194 words of the document:

Molecular formula shows the number of atoms of each element in one molecule of the
Molar mass mass of 1 mol of the substance, units g mol-1
Molar mass is found by adding together relative atomic masses
Empirical formula simplest whole number ratio of the atoms of each element in the
Empirical formula calculated by determining the mass of each element in a given mass of
substance and converting them to percentage mass to calculate ratios
Empirical formula to molecular formula find ratio of empirical formula to molecular
formula by dividing the molar mass by the empirical mass
Ionic compounds
Made up of anions and cations
Aqueous solution of metals and ammonium compounds are ionic
Cations positive ion formed by the loss of one or more electron of metals
Parentheses elements that form ions of many different charges in ionic compounds
Charge of parentheses shown using roman numerals
Anions negative ion formed by the gain of one or more electrons in some non-metals
Polyatomic anions contain more than one element

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Hydrated ionic compounds the number of water molecules is given by a full stop then
the number of water molecules after the ionic compounds formula
Molar mass of ionic compounds calculated the same way as molar masses of molecular
Dissolving ionic substances water is polar so many ionic compounds are soluble in
water, formula for showing this has the formula of the ionic compound on the left and the
formula of the two separate ions on the right with the state symbol (aq)…read more


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »