Beaker dry mass of

1
-

Beaker - dry mass of w/solid
beaker NaHCO3
2


-
Beaker beaker beaker initial
mass w/solid w/acid
3
CO2
-

CO2
Initial - final mass of CO2 Mass
mass
4
NaHCO3(s) HCl(aq) ? NaCl(aq) H2O(l) CO2(g)

• From equation
• One mole of NaHCO3 yields one
• mole of CO2, ?ratio is 11
• ? moles NaHCO3 moles CO2
• This is our predicted or
• theoretical amount

5
NaHCO3(s) HCl(aq) ? NaCl(aq) H2O(l) CO2(g)

• Mass of CO2 lost ? moles of CO2
• This is the actual amount of
• CO2 we measured in lab
• Ideally, should be the same as
• predicted!
• Differences would be due to
• errors in the lab

6
Yield

• Compare predicted amount of CO2 to actual amount
  of CO2
• 0.0568 mol/0.0592 mol x 100 95.9
  actual/predicted
• Or the yield was 95.9 of the theoretical
  (predicted) amount