Stoichiometry and Percent Yield

When reacting Na with Cl₂, we calculated that the theoretical yield should be 13 grams. Our actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96%

• 1.0%

Answer explanation

Tags

NGSS.HS-PS1-7

Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.

• 1.2%

• 120%

• 85%

• 76%

Answer explanation

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

• limiting

• actual

• excess

• theoretical

Answer explanation

Limiting = the reactant that runs out

Excess = the reactant that is left over when rxn stops

Theoretical = how much product you should make

Actual = how much product you actually make

Tags

NGSS.HS-PS1-7

What does percent yield indicate?

• The amount of product we should get

• The efficiency of the lab

• The amount of product we actually got

• nothing

Answer explanation

% Yield tells the efficiency of your work - how close you were to the theoretical value you should have gotten

When reacting Na with Cl₂, the theoretical yield of NaCl is 13.0 grams. The actual yield was 12.5 grams. What is the percent yield?

• 90.4%

• 104%

• 96.1%

• -3.9%

Answer explanation

Tags

NGSS.HS-PS1-7

• 80%

• 90%

• 95%

• 100%

Tags

NGSS.HS-PS1-7

What does percent yield indicate?

• The amount of product predicted

• The efficiency of the reaction

• The amount of product actually obtained

• Which reactant runs out first

Answer explanation

% Yield tells the efficiency of your work - how close you were to the theoretical value you should have gotten

Tags

NGSS.HS-PS1-7

• 56.08 g

• 112.16 g

• 168.24 g

• 224.32 g

Tags

NGSS.HS-PS1-7

What is the theoretical yield of water in grams when 2 moles of hydrogen react with 1 mole of oxygen?

• 18.02 g

• 36.04 g

• 72.08 g

• 144.16 g

Tags

NGSS.HS-PS1-7

• 40.30 g

• 80.60 g

• 120.90 g

• 161.20 g

Tags

NGSS.HS-PS1-7