reaction stoichiometry weight relations in chemical reactions: 1.if i react this much, how much...
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Reaction Stoichiometry
Weight relations in chemical reactions:1.If I react this much, how much product do I get?2.If I need this much product, how much do I need to react
1. If you have 200 tires, how many cars can you make?
1. 200 2. 100 3. 800 4. 50
2. If you have 200 tires, how many motorcycles can you make?
1. 200 2. 100 3. 800 4. 50
3. Consider:
Pb(NO3)2(aq) + 2 NaCl(aq) --> PbCl2(s) + 2 NaNO3(aq) If you have 5 moles of Pb(NO3)2, how many moles of PbCl2 can you make? 1. 5 2. 10 3. 2.5 4. Consider:
Pb(NO3)2(aq) + 2 NaCl(aq) --> PbCl2(s) + 2 NaNO3(aq) If you have 5 moles of NaCl, how many moles of PbCl2 can you make? 1. 5 2. 10 3. 2.5
General Stoichiometry RouteGrams reactant
Molesreactant
Moles product
Gramsproduct
2 CH3OH + 3 O2 2 CO2 + 4 H2OIf we react 100 grams of CH3OH, how many grams of H2O are formed?
amounts table
Limiting Reactants
1. If you have 200 tires and 75 steering wheels, how many cars can you make?
1. 2002. 753. 504. 100
Example 2.
A cake recipe calls for 3 eggs, 2 cups of flour, and 3 teaspoons of sugar. If you have:
• 9 eggs• 8 cups of flour• 12 teaspoons of sugar
how many cakes can you make? Enter the number of cakes.
actual experimental yield% Yield = 100%
theoretical calculated yield
Alum Lab Calculations:Let’s say you start with 0.985 g Al and make 14.8 g KAl(SO4)212 H2O product.
What is the percent yield?
Molar masses: Al = 26.98; KAl(SO4)212 H2O = 474.37 g/mol
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