Mole Ratios
When finding the mole ratio, we look at the...
EQUATION
What is our conversion factor for grams to moles (and vice versa)?
The Periodic Table
What does percent yield measure?
How successful the reaction was
What is a limiting reactant?
The reactant you use up first
What type of reaction is this?
AgF (aq) + CaCl2(aq) --> AgCl (s) + CaF2 (aq)
Precipitation
What is another way to set up this ratio?
3 mol H2O/2 mol O2
2 mol O2/3 mol H2O
How many grams of H2O can you get from 4 moles of KOH?
HCL + KOH --> KCl + H2O
72.06 g H2O
Draw (don't solve) the setup for the following percent yield problem:
Actual Yield: 42.33 g of KI
Theoretical Yield: 61.25 g of KI
42.33 g of KI/61.25 g of KI x 100% =
If we react 6 moles of HCl with 4 moles of NaOH and we have 2 moles of HCl left over, what was the limiting reactant?
HCl
Balance the following reaction:
_NaClO3 (s) --> _NaCl (s) + _O2
2,2,3
How many moles of NaOH are needed if 6 moles of Na2SO4 are produced?
H2SO4 + 2NaOH --> Na2SO4 + 2H2O
12 moles NaOH
How many grams of CH4 are needed to react with 8 moles of O2?
CH4 + 2 O2 --> CO2 + 2 H2O
64.06 g CH4
If we produce 15 grams of NaCl, but we expected to find 22 grams, what was our percent yield?
68.18%
What was our limiting reactant if, after reacting NaF and AgNO3, all the AgNO3 had been used up?
AgNO3
What four reaction types fall under the redox category?
Synthesis, decomposition, single-replacement, and combustion
If we have 7 moles of HCl, then how many moles of Na2S do we need?
Na2S + 2HCl --> 2NaCl + H2S
3.5 moles Na2S
How many grams of NH3 can be made from 25 moles of H2?
N2 + 3H2 --> 2NH3
283.85 g NH3
What is the percent yield if the theoretical yield is 40 grams the the actual yield is 29 grams?
72.5%
If there were 10 grams of NaCl, 0 grams of HCl, 3 grams of NaOH, and 12 grams of H2O left over from this reaction, what was our excess reactant?
HCl + NaOH --> NaCl + H2O
How many moles of O2 do we need to make 30 moles of H2O?
2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O
41.67 moles O2
If we produce 30 grams of PbI2, how many moles of KNO3 should we end up with?
2KI + Pb(NO3)2 --> PbI2 + 2KNO3
0.13 moles KNO3
Damian performed an acid-base reaction and had a 37% yield of salt (YIKES). If he was supposed to yield 20 grams, how much did he actually yield?
7.4 grams
If there was 8 grams of Na2SO4, 10 grams of H2O, and 4 grams of NaOH produced from the reaction, what was the limiting reactant?
H2SO4 + 2NaOH --> Na2SO4 + 2H2O
H2SO4