STOICHIOMETRY Mole to Mole

The calculation of quantities in chemical equations is called stoichiometry. In every chemical reaction the mass and atoms stay the same. The coefficients represent the numbers of moles or atoms and molecules.

In the reaction 2CO + O2  2CO2, the ratio of moles of oxygen used to moles of CO2 produced is 1:2 A correct interpretation of the balanced equation 2Al(s) + 3Pb(NO3)2(aq)  2Al(NO3)3(aq) + 3Pb(s) is … 2 moles Al + 3 moles Pb(NO3)2  2 moles Al(NO3)3 + 3 moles Pb

In C5H12 + 8O2  5CO2 + 6H2O 9 moles of reactants chemically change into 11 moles of product.

To convert from moles to moles: start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units

Ex: How many moles of aluminum oxide are produced when 0 Ex: How many moles of aluminum oxide are produced when 0.64 mol of aluminum reacts with oxygen? 4Al + 3O2  2Al2O3 start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units

Ex: How many moles of aluminum oxide are produced when 0 Ex: How many moles of aluminum oxide are produced when 0.63 mol of oxygen reacts with aluminum? 4Al + 3O2  2Al2O3 start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units

Ex: If 3.0 moles of HCl are consumed in the reaction below; how many moles of FeCl3 are produced? 6HCl + Fe2O3  2FeCl3 + 3H2O start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units

Ex: Given the balanced equation 16HCl + 2KMnO4  2KCl + 2MnCl2 + 5Cl2 + 8H2O if 1.0 mol of KMnO4 reacts, how many moles of H2O are produced? start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units

EX: Calculate the number of moles of Al2O3 that are produced when 0 EX: Calculate the number of moles of Al2O3 that are produced when 0.60 mol of Fe is produced in the following reaction. 2Al + 3FeO  3Fe + Al2O3 start with the given use one times sign what you want should be on top use given unit on the bottom write the coefficients in front of the units