Information in Chemical Equations
Write the equation that represents...
1 molecule of ethanol (C2H5OH) reacts with 3 molecules of oxygen (O2) to form 2 molecules of carbon dioxide and 3 molecules of water.
C2H5OH(g) + 3O2(g) --> 2CO2(g) + 3H2O(g)
What is a "molar ratio"?
Coefficients from the chemical equation (ratios between substances in a chemical equation)
What is the bridge used in stoichiometry to go from one substance to another?
Molar ratio
Based on this equation, how many mini s'mores can you make from 8 graham crackers, 2 chocolate chips, and 3 marshmallows?
2GC + 1CC + 1M --> 1 S'more
2 s'mores
What is the formula to calculate percent yield?
Actual/Theoretical x 100
What were the reactants in the percent yield lab?
Copper (II) chloride + sodium carbonate
Complete the lyric:
Shake it like a _________________
Shake it like a Polaroid picture, hey ya!
What does the coefficients of a balanced chemical equation tell us?
The proportions in which atoms and molecules react on an individual basis.
Stoichiometry is the relationship between what?
Reactants and reactants
Reactants and products
Products and products
How many grams of hydrogen can be formed from 18 grams of water?
2H2O --> 2H2 + O2
2.0g of H2
What is the definition of a limiting and excess reactant?
The limiting reactant runs out first in a reaction and will give the least amount of product. The excess reactant(s) are left over.
What is percent yield?
The amount of substances that was collected in a laboratory experiment.
What were the products in the percent yield lab?
copper (II) carbonate and sodium chloride
Who did OutKast say "I'm sorry" to?
Mrs. Jackson
"I'm sorry Ms. Jackson (oh), I am for real
Never meant to make your daughter cry
I apologize a trillion times
I'm sorry Ms. Jackson (oh), I am for real
Never meant to make your daughter cry
I apologize a trillion times"
Circle the part(s) of the following equation that represent moles
2H2O --> 2H2 + O2
The coefficients! Don't forget there's an INVISIBLE 1 in front of O2
2H2O --> 2H2 + 1O2
What is the molar ratio of hydrogen to ammonia in the following equation
3H2(g) + N2(g) --> 2NH3(g)
3:2
How many grams of aluminum should be weighed out to react with exactly 35.0 grams of iodine?
2Al + 3I2 --> 2AlI
2.48g Al
Hydrogen produces 20 grams of water. Oxygen produces 10 grams of water. Which is the limiting reactant?
oxygen (O2)
What is the percent yield?
Actual yield: 0.80g
Theoretical yield: 1.1g
73% (72.7%)
What kind of reaction was the lab?
Double replacement
What is Eminem's real name?
Name his daughter for bonus points.
Marshall Mathers III
Hailey Jade is his biological daughters name
What can't the coefficients of a chemical equation represent?
Grams (molar mass)
Anything that isn't moles or molecules
How many moles of phosphorus is needed to react with 2.5 moles of cobalt from the following equation.
Co(s) + P4(s) --> Co3P2(s)
0.42 mol P4
What mass of sodium carbonate is formed from 7.3g of sodium hydroxide.
NaOH(s) + CO2(g) --> Na2CO3(s) + H2O(l)
9.7g Na2CO3
How many grams of potassium nitrate form from 100. g of potassium bromide and 100. g of silver nitrate?
KBr + AgNO3 --> KNO3 + AgBr
59.5 g potassium nitrate
6.0g of ammonia and excess oxygen react according to the equation below.
NH3 + O2 --> NO + H2O
If the actual yield is 4.3g, what is the percent yield of water?
45%
What product was in the Erlenmeyer flask?
sodium chloride solution
Complete the verse... by D12
"These chicks don't even know the Name of my band..."
These chicks don't even know the
Name of my band
But they're all on me like they
Wanna hold hands
'Cause once I blow, they know
That I'll be the man
All because I'm the lead
Singer of my band
- Name of My Band by D12
Explain why the coefficients of a chemical equation cannot represent mass.
Solid sodium sulfide is placed in a solution of hydrochloric acid to produce sodium chloride and hydrosulfuric acid. How many moles of hydrochloric acid would be required to react with 34 moles of sodium sulfide?
68 moles of hydrochloric acid
What is the mass of hydrosulfuric acid formed from the double replacement reaction of 12 grams of iron (II) sulfide and hydrochloric acid.
4.7g of hydrosulfuric acid formed
How many grams of oxygen can be formed from 6.3 grams of carbon dioxide and 7.2 grams of water? (C6H12O6 is a by-product)
4.6 g O2
4.0 g of copper and 3.6 g of silver nitrate solution react to form silver and copper (II) nitrate. The filter paper has a mass of 0.90g and the filter paper plus silver has a mass of 2.6g. What is the percent yield of silver?
74%
List 2 sources of error that would contribute to a low percent yield and 1 source of error that would contribute to a high percent yield.
Low percent yield:
Not thoroughly rinsing the beakers when transferring the products
Spilling the solution
High percent yield:
not allowing the products to dry thoroughly
What did Snoop Dogg change his name to in 2012?
Snoop Lion