POGIL: Stoichiometry

POGIL: Stoichiometry

Model 1: Mole to Mole

Fill in the Blanks

Multiple Choice

Where did the  $$\frac{3\ mol\ H_2}{2\ mol\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Double check to see if 52.2 moles of H₂ is the correct answer.

$$\frac{34.8\ \times3}{2}$$  

• Yes

• No

Multiple Choice

Given the following chemical equation 4P + 5O₂ →  2P₂O₅

Which is the correct setup to determine: How many moles of P₂O₅ are formed from 3.4 moles of O₂?

Use Model 1: Mole to Mole

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ P_2O_5}{5\ mol\ O_2}=\ 1.36\ mol\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{5\ mol\ P_2O_5}{2\ mol\ O_2}=\ 8.5\ mol\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{1\ mol\ P_2O_5}{1\ mol\ O_2}=\ 3.4\ mol\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ O_2}{5\ mol\ P_2O_5}=\ 1.36\ mol\ O_2$$  

Multiple Choice

Given the following chemical equation

4P + 5O₂ →  2P₂O₅

Which is the correct setup to determine: How many moles of P are formed from 30.1 moles of O₂?

Use Model 1: Mole to Mole

• $$30.1\ mol\ O_2\ \times\ \frac{4\ mol\ P}{5\ mol\ O_2}=\ 24.08\ mol\ P$$  

• $$30.1\ mol\ O_2\ \times\ \frac{5\ mol\ P}{4\ mol\ O_2}=\ 37.6\ mol\ P$$  

• $$30.1\ mol\ O_2\ \times\ \frac{1\ mol\ P}{1\ mol\ O_2}=\ 30.1\ mol\ P_2O_5$$  

• $$30.1\ mol\ O_2\ \times\ \frac{2\ mol\ O_2}{5\ mol\ P_2O_5}=\ 12.04\ mol\ O_2$$  

Model 2: Mole to Mass

Fill in the Blanks

Multiple Choice

Where did the  $$\frac{3\ mol\ H_2}{2\ mol\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Where did the  $$\frac{2.02\ g\ H_2}{1\ mol\ H_2}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Double check to see if 105 g H₂ is the correct answer.

$$\frac{34.8\ \times3\times2.02}{2\times1}$$  

• Yes

• No

Multiple Choice

Review: What is the molar mass of P₂O₅?

• $$P_2O_5\ =\ 142\ \frac{g}{mol}$$  

• $$P_2O_5\ =\ 32\ \frac{g}{mol}$$  

Multiple Choice

Given the following chemical equation 4P + 5O₂ →  2P₂O₅

Which is the correct setup to determine: How many grams of P₂O₅ are formed from 3.4 moles of O₂?

Use Model 2: Mole to Mass

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ P_2O_5}{5\ mol\ O_2}\times\frac{142\ g\ P_2O_5}{1\ mol\ P_2O_5}=193.12\ g\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{5\ mol\ P_2O_5}{2\ mol\ O_2}\times\frac{142\ g\ P_2O_5}{1\ mol\ P_2O_5}=1,207\ g\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ P_2O_5}{5\ mol\ O_2}\times\frac{1\ mol\ P_2O_5}{142\ g\ P_2O_5}=0.010\ g\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ O_2}{5\ mol\ P_2O_5}=\ 1.36\ mol\ O_2$$  

Model 3: Mass to mole

Fill in the Blanks

Multiple Choice

Where did the  $$\frac{1\ mol\ NH_3}{17.04\ g\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Where did the  $$\frac{3\ mol\ H_2}{2\ mol\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Double check to see if 3.06 mol H₂ is the correct answer.

$$\frac{34.8\ \times1\times3}{17.04\times2}$$

• Yes

• No

Multiple Choice

Review: What is the molar mass of O₂?

• $$O_2\ =\ 142\ \frac{g}{mol}$$  

• $$O_2\ =\ 32\ \frac{g}{mol}$$  

Multiple Choice

Given the following chemical equation 4P + 5O₂ →  2P₂O₅

Which is the correct setup to determine: How many moles of P₂O₅ are formed from 3.4 grams of O₂?

Use Model 3: Mass to Mole

• $$3.4\ g\ O_2\ \times\ \frac{1\ mol\ O_2}{32\ g\ O_2}\times\frac{2\ mol\ P_2O_5}{5\ mol\ O_2}=\ 0.04\ mol\ P_2O_5$$  

• $$3.4\ g\ O_2\ \times\ \frac{1\ mol\ O_2}{32\ g\ O_2}\times\frac{5\ mol\ P_2O_5}{2\ mol\ O_2}=\ 0.27\ mol\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ P_2O_5}{5\ mol\ O_2}\times\frac{1\ mol\ P_2O_5}{142\ g\ P_2O_5}=0.010\ g\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ O_2}{5\ mol\ P_2O_5}=\ 1.36\ mol\ O_2$$  

Model 4: Mass to mass

Fill in the Blanks

Multiple Choice

Where did the  $$\frac{1\ mol\ NH_3}{17.04\ g\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Where did the  $$\frac{3\ mol\ H_2}{2\ mol\ NH_3}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Where did the  $$\frac{2.02\ g\ H_2}{1\ mol\ H_2}$$  come from?

• The mole ratio from the balanced equation

• The Molar Mass of H₂

• The Molar Mass of NH₃

Multiple Choice

Double check to see if 6.19 g H₂ is the correct answer.

$$\frac{34.8\ \times1\times3\times2.02}{17.04\times2\times1}$$

• Yes

• No

Multiple Choice

Given the following chemical equation 4P + 5O₂ →  2P₂O₅

Which is the correct setup to determine: How many grams of P₂O₅ are formed from 3.4 grams of O₂?

Use Model 4: Mass to Mass

• $$3.4\ g\ O_2\ \times\ \frac{1\ mol\ O_2}{32\ g\ O_2}\times\frac{2\ mol\ P_2O_5}{5\ mol\ O_2}\times\frac{142\ g\ P_2O_5}{1\ mol\ P_2O_5}=\ 6.04\ g\ P_2O_5$$  

• $$3.4\ g\ O_2\ \times\ \frac{1\ mol\ O_2}{32\ g\ O_2}\times\frac{5\ mol\ P_2O_5}{2\ mol\ O_2}=\ 0.27\ mol\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ P_2O_5}{5\ mol\ O_2}\times\frac{1\ mol\ P_2O_5}{142\ g\ P_2O_5}=0.010\ g\ P_2O_5$$  

• $$3.4\ mol\ O_2\ \times\ \frac{2\ mol\ O_2}{5\ mol\ P_2O_5}=\ 1.36\ mol\ O_2$$