Example
= 1133 g BaCl2
grams of known* 1 mol of known
= mol of known
1
grams of known
Moles to Moles
mol of known
1
? mol of unknown
? mol of known
= mol of unknown
Moles to Grams (mass)
mol of unknown
1
grams of unknown
1 mol unknown
= grams of unknown*
Na = 22.99 g
O = 15.99 g
H = 1.00 g
39.98 g
Example
435 g NaOH
1
Grams of Known
1 mol NaOH
39.98 g NaOH
= 10.9 mol NaOH
Balanced Equation (Mole to Mole Ratio)
2NaOH + BaCl2 2NaCl + Ba(OH)2
Example
10.9 mol NaOH
1
1 mol BaCl2
2 mol NaOH
= 5.45 mol BaCl2
STOICHIOMETRY CHEAT SHEET
Grams (mass) to Moles
Grams to Moles to Moles to Grams (Putting it all together)
= grams of unknown*
435 g NaOH
1 mol NaOH
1 mol BaCl2
208.2 g BaCl2
1
39.98 g NaOH
2 mol NaOH
1 mol BaCl2
*given in problem *what you are solving for in problem
grams of known* 1 mol of known ? mol of unknown grams of unknown
1 grams of known ? mol of known 1 mol unknown
Grams of Unknown
Ba = 137.3 g
2-Cl = 70.9 g
208.2 g
Example
5.45 mol BaCl2 208.2 g BaCl2
1 1 mol BaCl2
= 1133 g BaCl2