STOICHIOMETRY CHEAT SHEET Grams of Known Na = 22.99 g

O = 15.99 g H = 1.00 g

Grams (mass) to Moles Example 39.98 g

grams of known* 1 mol of known 435 g NaOH 1 mol NaOH

1 grams of known 1 39.98 g NaOH

Balanced Equation (Mole to Mole Ratio)

2NaOH + BaCl2 2NaCl + Ba(OH)2

Moles to Moles Example

mol of known ? mol of unknown 10.9 mol NaOH 1 mol BaCl2

1 ? mol of known 1 2 mol NaOH

Grams of Unknown Ba = 137.3 g

Moles to Grams (mass) 2-Cl = 70.9 g

208.2 g

mol of unknown grams of unknown Example

1 1 mol unknown 5.45 mol BaCl2 208.2 g BaCl2

1 1 mol BaCl2

= 1133 g BaCl2

Grams to Moles to Moles to Grams (Putting it all together)

grams of known* 1 mol of known ? mol of unknown grams of unknown

1 grams of known ? mol of known 1 mol unknown

Example

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

= mol of known

= 10.9 mol NaOH

= mol of unknown = 5.45 mol BaCl2

= grams of unknown*

= grams of unknown*

= 1133 g BaCl2