Stoich Basics
What is the first step you take when doing stoichiometry?
What is Writing the balanced equation with correct coefficients!
What is the shorthand name for moles
What is a mol?
What is something you could use to help you with the conversion process?
What is Simplify the question and write only the needed info.
OR just consider what you want to cancel goes below in denominator and what you want in numerator
Amount of Moles present in 55 g of C
4.6 moles C 2 sig figs
Fe3O4 + 4 CO--->3 Fe + 4 CO2
How many moles of CO are needed to react with
16.5 g of Fe3O4?
0.285 moles CO
What is Stoichiometry?
Mass/mol relationships between substances in a chemical reaction.
What is Avogadro's number?
6.02x1023 atoms/....
The conversion when you convert from moles to grams?
What is the Molar Mass conversion g/1mol?
Percent of substance if theoretical yield was 4.35 g & the actual yield was 2.67 g.
What is 61.4% ? 3 sig figs only
1 C6H12O6 --> 2 C2H5OH + 2 CO2
Grams of C6H12O6 will you need to produce 15 grams of C2H5OH?
What are 29.3 g C6H12O6 ?
What do we look at to find mole ratios?
The coefficients in a balanced equation.
What are you calculating if you add the atomic masses from the periodic table for a molecule or compound?
What is Molar mass g/1 mol?
4Al+ 3O2---> 2Al2O3
Find the mole ratio of Aluminum to Oxygen
What is 4 to 3? or 4/3
Grams(mass) in 8.27 moles of LiOH
What is 198 gram of LiOH?
Given the following equation:
LiOH + KCl 🡪 LiCl + KOH
I began this reaction with 20.0 g of lithium hydroxide. What is my theoretical yield of lithium chloride?
35.4g LiCl
What is Actual Yield?
Actual amount of a product that can be formed with the limiting reactant.
How do we convert moles to grams?
Multiply by molar mass.
What is the name of the conversion for when you are trying to convert from moles A to moles B?
What is the mole ratio?
2KClO3 → 2KCl + 3O2
Moles of KClO3 must decompose in order to produce 9 moles of oxygen gas?
6 moles KClO3
Grams of O2 will be needed to produce from 1.7 g of H2O?
O2 + H2 --> H2O
What is 1.5 g O2 ?
What is a Theoretical Yield?
The maximum amount of a product that can be given off in perfect conditions.
What are you calculating for if you divide by 6.02x10^23 then multiply by molar mass?
Converting from atoms to grams
Balance this
Fe+ O2---> Fe2O3
4 Fe+ 3 O2---> 2 Fe2O3
4 Fe+ 3 O2---> 2 Fe2O3
How many moles of Fe2O3 will form from 5.0 moles of Fe?
2.5 moles
What is the percent yield!?
Find the Theoretical yield of Calcium Chloride if I start with 20.0 grams of sodium chloride?
The actual yield would be 10.7 grams
2 NaCl + CaO 🡪 CaCl2 + Na2O
56.3 % yield