CHEM 1212 Final LSU
a. appropriate waste container What is the proper disposal method:
b. trash can a. reaction mixture
c. broken glass box b. used pipet
d. appropriate waste container c. cracked/chipped beaker
e. trash can d. excess chemical
e. used filter paper
After everyone has put away all chemicals and glassware When is it okay to remove splash proof goggles?
a, c, d, g Which of the following are appropriate to wear in lab?
a. lab apron
b. leggings
c. jeans
d. scrub pants
e. knee length shorts
f. midriff top
g. t shirt
h. tank top
NaOH, H2SO4 Which chemicals used in exp. 2 are toxic?
oxidation-reduction reaction Identify the type of reaction:
A + B --> A^+ + B^-
combination (synthesis) reaction Identify the typre of reaction:
A + B --> AB
Wash your eye for 15 minutes with water from the What should you do if chemical gets in your eye?
eyewash station and notify the TA
Wash the skin for 15 minutes with water and notify the TA What should you do if chemical gets on your skin?
4FeO (s) + O2 (g)--> 2FeO3 (s) Write, balance, & classify the equation: When green FeO (s) is heated in the
combination/synthesis presence of O2 (g), if forms a rust-brown solid, Fe2O3 (s)
CuO In exp 3, what was the chmical formula of the black solid?
CuSO4 In exp 3, what was the chemical formula of the sky blue soln?
1 copper sacch : 2 sodium sacch In exp 3, what was the mole ratio of copper sacch and sodium sacch?
percient: 74.1 Cooper & Zach did exp 3 dissolving 3.46g of copper acetate and adding 7.74g od
theoretical: 9.28 sodium sacch. They recovered 6.88g of product. In their calculations, they found
actual: 6.88 9.28g should have been produced. Their calculation of (6.88g/9.28g)(100%)=74.1%
What is the percient, theoretical, and actual yield?
, CHEM 1212 Final LSU
10.19g Cooper, Zach, and Nate did exp. 3 dissolving 3.80g of copper acetate and adding
8.60g of sodium sacch.
What is the theoretical yield of the product?
mm of copper acetate: 199.65g/mol
mm od sodium sacch: 223.18g/mol
mm of product: 535.59g/mol
71.2% Zach and Nate calculated the theoretical yield as 6.30g of copper sacch. They
recovered 4.49g. What is the percent yield?
theoretical yield: 7.65g In a similar experiment, Cooper, Zach, and Nate started with 2.85g of copper
percent yield: 80.7% acetate and 6.77g of sodium sacch and obtained 6.17g of copper sacch.
What is the theoretical and percient yield?
lowers the actual yield In exp 4, how will spilling some of the sodium sacch while transferring the solid to
the beaker affect the actual yield?
lowers the actual yield In exp 4, how will washing the crystals with hot water affect the actual yield?
a Which statement best explains what happens to the percent yield if the crystals
(product) were washed with hot water?
a. The actual yield will decrease since part of the product will dissolve and not be
recovered as a solid. Since the actual yield is in the numerator, the percent yield will
also decrease.
b. The actual yield will increase since the original amount of product will now absorb
water. And since the actual yield is in the denominator, the percent yield will
decrease.
c. The actual yield will increase since the original amount of product will now absorb
water. Since the actual yield is in the numerator, the percent yield will also increase.
d. The actual yield will decrease since part of the product will dissolve and not be
recovered as a solid. But since the actual yield is in the denominator, the percent
yield will increase.
coordination compound a chemical species that contains a metal ion that is coordinated to ligands
aliquot a small portion of a chemical species
theoretical yield the amount of product that could be produced using a given amount of reactant
actual: 3.43g 3.25g NiCl2*6H20 reacts with 12ml of 4.00M C2H8N2. 3.43g of product were
theoretical: 4.24g recovered. The filtrate was light pink. The litmus test turned the red litmus paper
excess: c2h8n2 blue.
limiting reagent: NiCl2*6H20
NiCl*6H20 + 3C2H8N2 --> (Ni(C2H8N2)3)Cl2 + 6H20
mm of NiCl2*6H20: 237.69g/mol
mm of product is 309.90g/mol
Find the actual and theoretical yield. Which chemical is the limiting reagent? Which
chemical is present in excess?
a. appropriate waste container What is the proper disposal method:
b. trash can a. reaction mixture
c. broken glass box b. used pipet
d. appropriate waste container c. cracked/chipped beaker
e. trash can d. excess chemical
e. used filter paper
After everyone has put away all chemicals and glassware When is it okay to remove splash proof goggles?
a, c, d, g Which of the following are appropriate to wear in lab?
a. lab apron
b. leggings
c. jeans
d. scrub pants
e. knee length shorts
f. midriff top
g. t shirt
h. tank top
NaOH, H2SO4 Which chemicals used in exp. 2 are toxic?
oxidation-reduction reaction Identify the type of reaction:
A + B --> A^+ + B^-
combination (synthesis) reaction Identify the typre of reaction:
A + B --> AB
Wash your eye for 15 minutes with water from the What should you do if chemical gets in your eye?
eyewash station and notify the TA
Wash the skin for 15 minutes with water and notify the TA What should you do if chemical gets on your skin?
4FeO (s) + O2 (g)--> 2FeO3 (s) Write, balance, & classify the equation: When green FeO (s) is heated in the
combination/synthesis presence of O2 (g), if forms a rust-brown solid, Fe2O3 (s)
CuO In exp 3, what was the chmical formula of the black solid?
CuSO4 In exp 3, what was the chemical formula of the sky blue soln?
1 copper sacch : 2 sodium sacch In exp 3, what was the mole ratio of copper sacch and sodium sacch?
percient: 74.1 Cooper & Zach did exp 3 dissolving 3.46g of copper acetate and adding 7.74g od
theoretical: 9.28 sodium sacch. They recovered 6.88g of product. In their calculations, they found
actual: 6.88 9.28g should have been produced. Their calculation of (6.88g/9.28g)(100%)=74.1%
What is the percient, theoretical, and actual yield?
, CHEM 1212 Final LSU
10.19g Cooper, Zach, and Nate did exp. 3 dissolving 3.80g of copper acetate and adding
8.60g of sodium sacch.
What is the theoretical yield of the product?
mm of copper acetate: 199.65g/mol
mm od sodium sacch: 223.18g/mol
mm of product: 535.59g/mol
71.2% Zach and Nate calculated the theoretical yield as 6.30g of copper sacch. They
recovered 4.49g. What is the percent yield?
theoretical yield: 7.65g In a similar experiment, Cooper, Zach, and Nate started with 2.85g of copper
percent yield: 80.7% acetate and 6.77g of sodium sacch and obtained 6.17g of copper sacch.
What is the theoretical and percient yield?
lowers the actual yield In exp 4, how will spilling some of the sodium sacch while transferring the solid to
the beaker affect the actual yield?
lowers the actual yield In exp 4, how will washing the crystals with hot water affect the actual yield?
a Which statement best explains what happens to the percent yield if the crystals
(product) were washed with hot water?
a. The actual yield will decrease since part of the product will dissolve and not be
recovered as a solid. Since the actual yield is in the numerator, the percent yield will
also decrease.
b. The actual yield will increase since the original amount of product will now absorb
water. And since the actual yield is in the denominator, the percent yield will
decrease.
c. The actual yield will increase since the original amount of product will now absorb
water. Since the actual yield is in the numerator, the percent yield will also increase.
d. The actual yield will decrease since part of the product will dissolve and not be
recovered as a solid. But since the actual yield is in the denominator, the percent
yield will increase.
coordination compound a chemical species that contains a metal ion that is coordinated to ligands
aliquot a small portion of a chemical species
theoretical yield the amount of product that could be produced using a given amount of reactant
actual: 3.43g 3.25g NiCl2*6H20 reacts with 12ml of 4.00M C2H8N2. 3.43g of product were
theoretical: 4.24g recovered. The filtrate was light pink. The litmus test turned the red litmus paper
excess: c2h8n2 blue.
limiting reagent: NiCl2*6H20
NiCl*6H20 + 3C2H8N2 --> (Ni(C2H8N2)3)Cl2 + 6H20
mm of NiCl2*6H20: 237.69g/mol
mm of product is 309.90g/mol
Find the actual and theoretical yield. Which chemical is the limiting reagent? Which
chemical is present in excess?
