Tuesday, March 22

Sections 2H & 4: Tonight you will continue your work on limiting reagents. You will complete the worksheet under Homework Documents (the second page is the answers, so you can see how you're doing...yessssssssss!). Below are links to some videos and an image to help you:

Introduction to Limiting Reactant and Excess Reactant

Limiting Reactant Practice Problem

Don't forget!: We will have a test on all four problem types AND limiting reactants when we return from break (not the first class back). Start studying NOW! I will not re-teach material when we return from vacation.

Gram to Gram conversion answers:

Monday, March 21

Section 2H: Complete your Formula of a Hydrate lab and then watch and take notes on this video: How to Calculate Limiting Reactant

Section 5: Complete the stoichiometry worksheet we've been working on (questions 1-5 all parts). Also, try these:
1) 8 Fe + S8 ---> 8 FeS 
a) What mass of iron is needed to react with 16.0 grams of sulfur?
b) How many grams of FeS are produced?

2) Cu + 2 AgNO₃ ---> Cu(NO₃)₂ + 2 Ag
a) How many moles of Cu are needed to react with 3.50 moles of AgNO₃?
b) If 89.5 grams of Ag were produced, how many grams of Cu reacted?

This great template, courtesy of Jack Kitson, Jeremy Ayala and Ryan Coad should help:

Friday, March 18

Section 4:
1. Complete problem 5 from our last homework, using our new gram to gram template we created at the end of class 
2. Complete the stoichiometry worksheet we've been working on (questions 1-5 all parts)

Section 5: Complete the following:
1) Given the following equation: 2 K + Cl₂ → 2 KCl 
a) How many moles of KCl is produced from 2.50 g of K? 
b) How many moles of KCl are produced from 1.00 g of Cl₂?

2) Given the following equation: Na₂O + H₂O → 2 NaOH 
a) How many moles of NaOH is produced from 120. grams of Na₂O? 

b) How many moles of Na₂O are required to produce 160. grams of NaOH?

3) Given the following equation: Cu + 2 AgNO₃ ---> Cu(NO₃)₂ + 2 Ag
a) How many moles of Cu are needed to react with 3.50 moles of AgNO₃?
b) If 89.5 grams of Ag were produced, how many moles of Cu reacted?

4) Molten iron and carbon monoxide are produced in a blast furnace by the reaction of iron(III) oxide and pure carbon.
a) Write and balance the equation for the reaction.
b) If 25.0 grams of pure  Fe₂O₃ is used, how many moles of iron can be produced?

5) The average human requires 120.0 grams of glucose (C₆H₁₂O₆) per day. How many moles of 

CO₂ (in the photosynthesis reaction) are required for this amount of glucose?

*Challenge: Create a T-Chart template for a gram to gram conversion (hint: it requires 3 conversions!)

Wednesday, March 16

Section 2H: Complete the stoichiometry worksheet we've been working on (questions 1-5 all parts). Also, try these:
1) 8 Fe + S8 ---> 8 FeS
a) What mass of iron is needed to react with 16.0 grams of sulfur?
b) How many grams of FeS are produced?

2) Cu + 2 AgNO₃ ---> Cu(NO₃)₂ + 2 Ag
a) How many moles of Cu are needed to react with 3.50 moles of AgNO₃?
b) If 89.5 grams of Ag were produced, how many grams of Cu reacted?

Section 4: Complete the following:
1) Given the following equation: 2 K + Cl₂ → 2 KCl
a) How many moles of KCl is produced from 2.50 g of K?
b) How many moles of KCl are produced from 1.00 g of Cl₂?

2) Given the following equation: Na₂O + H₂O → 2 NaOH
a) How many moles of NaOH is produced from 120. grams of Na₂O?

b) How many moles of Na₂O are required to produce 160. grams of NaOH?

3) Given the following equation: Cu + 2 AgNO₃ ---> Cu(NO₃)₂ + 2 Ag
a) How many moles of Cu are needed to react with 3.50 moles of AgNO₃?
b) If 89.5 grams of Ag were produced, how many grams of Cu reacted?

4) Molten iron and carbon monoxide are produced in a blast furnace by the reaction of iron(III) oxide and pure carbon.
a) Write and balance the equation for the reaction.
b) If 25.0 grams of pure  Fe₂O₃ is used, how many moles of iron can be produced?

5) The average human requires 120.0 grams of glucose (C₆H₁₂O₆) per day. How many grams of 

CO₂ (in the photosynthesis reaction) are required for this amount of glucose?

Tuesday, March 15

Section 5: Complete the problems below. The problem type is indicated in parenthesis to help you reference your notes/the textbook, if needed.
1. Write the balanced equation for the combustion of ethyl alcohol,
C2H5OH. If 3.662 moles of ethyl alcohol are burned, how many moles of water can be formed? (PT1)

2. Given: 2 Al(s) + 6 HCl(aq) ® 2 AlCl3(aq) + 3 H2(g), how many moles of aluminum chloride can be obtained from the reaction of 25.7 g of hydrochloric acid? (PT3)

3. In the reaction P4 + 5 O2 ® 2 P2O5, how many moles of oxygen are consumed each time 0.500 mol of P2O5 is formed?(PT1)

4. In the reaction in question 3 above, how many grams of diphosphorus pentoxide could be formed from 0.34 moles of oxygen?(PT2)

5. Given the following equation: 2 NaClO3 ---> 2 NaCl + 3 O2, 2.00 molesof NaClO3 will produce how many grams of O2? (PT2)

For anyone who may need it, here's an enrichment video for completing these types of problems:
Stoichiometry Problems: Moles to Grams