Actual, Theoretical and Percent Yield

CH₄  +  2O₂  →  CO₂  +  2H₂O
24 grams of CH₄ was added to the above reaction. Calculate the theoretical yield of CO₂.

• 66 grams
• 132 grams
• 33 grams
• 8.72

Tags

NGSS.HS-PS1-7

The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting

• Percent
• actual
• stoichiometry
• theoretical

Tags

NGSS.HS-PS1-6

NGSS.HS-PS1-7

When reacting Na with Cl₂, we calculated that the theoretical yield should be 12.5 grams. Our actual yield was 13.0 grams. What is the percent yield?

• 100%
• 104%
• 96%
• 1.04

Tags

NGSS.HS-PS1-7

2Fe₂O₃ + 3C → 4Fe + 3CO₂

You add 28 grams of carbon. You find the actual yield to be 81.2 grams of CO₂. What is the percent yield of CO₂? (Hint: calculate theoretical yield of CO₂ first)

• 15.8%

• 209.2%

• 79.1%

• 15.5

Your percent yield is 80%. The actual amount of product produced was 29.1 grams. What is the theoretical yield?

• 25.2 grams
• 37.3 grams
• 37.1 grams
• 36.3 grams

Tags

NGSS.HS-PS1-7

In a lab, a scientist calculate he should produce 12.3 grams of product in his experiment. When he is finished collecting his product it weighs 10.1 grams. What is his percent yield?

• 82%
• 0.82%
• 10.1 %
• 100%

Tags

NGSS.HS-PS1-7

The reaction of 25.0 g benzene, C₆H₆, with excess HNO₃ resulted in 21.4 g C₆H₅NO₂. What is the percentage yield?

C₆H₆ + HNO₃ → C₆H₅NO₂ + H₂O

• 100%

• 27.39%

• 54.29%

• 85.62%

Tags

NGSS.HS-PS1-7

Lead nitrate can be decomposed by heating.  What is the % yield of the decomposition reaction if 7.4g Pb(NO₃)₂ are heated to give 4.1 g PbO?
2Pb(NO₃)_{2 (s)}→2PbO_(s)+4NO_2(g)+O_2(g)

• 82%
• 44%
• 56%
• 67%

Tags

NGSS.HS-PS1-7

3. The reactant that is not completely used up in a chemical reaction is called the __________ .

• spectator reagent
• limiting reagent
• excess reagent
• catalyst

Tags

NGSS.HS-PS1-7

2. True or False?
A chemical reaction stops before the limiting reagent is used up.

• True
• False

Tags

NGSS.HS-PS1-7