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Wednesday, March 23

Section 5: 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:












Have a great break!!

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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:

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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:
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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!)
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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?
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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
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Monday, March 14

Sections 2H & 4: 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 moles of NaClO3 will produce how many grams of O2? (PT2)
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Friday, March 11

Sections 2H & 5: Take notes on this video:How to Calculate Molar Mass Practice Problems
Then, calculate the molar mass of:
1. Lead (II) nitrate
2. Sodium iodide
3. Sodium nitrate
4. Lead (II) iodide
5. Magnesium oxide
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Thursday, March 10

Section 4: Take notes on this video:How to Calculate Molar Mass Practice Problems
Then, calculate the molar mass of:
1. Lead (II) nitrate
2. Sodium iodide
3. Sodium nitrate
4. Lead (II) iodide
5. Magnesium oxide

Section 5: If you have not already, outline pages 299 - 301 from your textbook. Then, answer section review questions 1-4 on page 301.
Then, write the balanced chemical equations for the problems on the worksheet we started today (2a, 3b, 4a & 5a). Then, answer the following questions in your notebook:

1.    Nitrogen reacts with hydrogen to produce ammonia.
a.     Write a balanced chemical equation
b.    How many moles of hydrogen, H2, are needed to react with 2.0 moles of nitrogen, N2?
2.    Zinc reacts with hydrochloric acid…
a.     Predict the products of this reaction, then write and balance the equation.
b.    How many moles of hydrogen are produced from the reaction of 3.7 moles of zinc?
3.    Write a balanced combustion reaction for propane (C3H8)
4.    How many moles of oxygen are necessary to react completely with 4.5 moles of propane (C3H8)?
5.    Write a balanced chemical equation for the double replacement reaction between potassium phosphate and aluminum nitrate.
a.     How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?
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Wednesday, March 9

Sections 2H & 4: First, write the balanced chemical equations for the problems on the worksheet we started today (2a, 3b, 4a & 5a). Then, answer the following questions in your notebook:

1.    Nitrogen reacts with hydrogen to produce ammonia.
a.     Write a balanced chemical equation
b.    How many moles of hydrogen, H2, are needed to react with 2.0 moles of nitrogen, N2?
2.    Zinc reacts with hydrochloric acid…
a.     Predict the products of this reaction, then write and balance the equation.
b.    How many moles of hydrogen are produced from the reaction of 3.7 moles of zinc?
3.    Write a balanced combustion reaction for propane (C3H8)
4.    How many moles of oxygen are necessary to react completely with 4.5 moles of propane (C3H8)?
5.    Write a balanced chemical equation for the double replacement reaction between potassium phosphate and aluminum nitrate.

a.     How many moles of potassium nitrate are produced when 2.5 moles of potassium phosphate react?
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Tuesday, March 8

Sections 2H & 4: Outline pages 299 - 301 from your textbook. Then, answer section review questions 1-4 on page 301.
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Friday, March 4

Section 5: Based on today's class, you may need to go back and re-do the homework that was due today. Also, watch this video (please copy down the few note-worthy things he puts on the screen, i.e. definitions, terms, etc): Stoichiometry: Chemistry for Massive Creatures

Section 4: Outline pages 299 - 301 from your textbook. Then, answer section review questions 1-4 on page 301.

Kairos Homework: 
1) Outline pages 299 - 301 from your textbook. Then, answer section review questions 1-4 on page 301.
2) Watch this video: Stoichiometry: Chemistry for Massive Creatures
3) If you missed the quiz on chapter 8 please email me to set up a time to make it up.

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Thursday, March 3

Section 2H & 4: Based on today's class, you may need to go back and re-do the homework that was due today. Also, watch this video (please copy down the few note-worthy things he puts on the screen, i.e. definitions, terms, etc): Stoichiometry: Chemistry for Massive Creatures
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Wednesday, March 3

Section 5: Answer the following questions in your notebook. You need to know that: 1) a stack of 30 pennies is 4.15 cm tall and 2) a light year is a measurement of distance. 
If you want to do this successfully, make sure to assign units to EVERYTHING before multiplying or dividing. Track your units throughout! 

1. What is the average height of a penny?  Using the average height determine the height of a stack of 6.022x1023 pennies in km.
2. How many light years is this? (Light travels 3.00x108 km per second)
3. How many round trips is this to the moon? (Distance to moon from earth 364,000 km)
4. Assuming that each human being has 60 trillion body cells (6.0 x 1013) and the Earth's population is 7 billion (7 x 109), what is the total number of living human body cells on the Earth at the present time?
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Tuesday, March 1

Section 2H: Complete the pink sheet (back side, all parts) for homework. Remember: the most important thing to do is TRACK YOUR UNITS. To complete the worksheet you will need to know: a stack of 30 pennies is 4.15 cm tall.

Section 4: Answer the following questions in your notebook. You need to know that: 1) a stack of 30 pennies is 4.15 cm tall and 2) a light year is a measurement of distance. 
If you want to do this successfully, make sure to assign units to EVERYTHING before multiplying or dividing. Track your units throughout! 

1. What is the average height of a penny?  Using the average height determine the height of a stack of 6.022x1023 pennies in km.
2. How many light years is this? (Light travels 3.00x108 km per second)
3. How many round trips is this to the moon? (Distance to moon from earth 364,000 km)
4. Assuming that each human being has 60 trillion body cells (6.0 x 1013) and the Earth's population is 7 billion (7 x 109), what is the total number of living human body cells on the Earth at the present time?
 
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