1. Stoichiometry

2. 10 steps to stoich Write word equation Write formula equation Balance
Write given info under it in equation
Write what you solving for under it in equation
Convert given info into moles
Use the mole ratio
Convert moles into g, parts, …
Calculate answer
Write answer with correct sig figs and units

3. If 21.0 g of silver nitrate (169.9) was added to excess calcium chloride (110.98), how many grams of solid silver chloride (143.35) should have formed? What is the other product?
Silver nitrate + calcium chloride  silver chloride + calcium nitrate AgNO3 (aq) + CaCl2 (aq)  AgCl (s) + Ca(NO3)2 (aq) 2 2
21.0 g
? g 7 8 6 =
17.7 g AgCl
Always 1 mol in step 6 and 8
Numbers come from balanced equation

4. AgNO3 (aq) + CaCl2 (aq)  AgCl (s) + Ca(NO3)2 (aq)
North side convert 21.0 g AgNO3  ? g CaCl2
South side convert 17.7 g AgCl  ? g CaCl2 2 2
? g
21.0 g
17.7 g
6.86 g CaCl2
Different do to rounding off only
6.85 g CaCl2