Mole Triangle Quiz Finish Air Bag Lab Stoichiometry

Mole Triangle Quiz Finish “Air Bag” Lab, Stoichiometry Problems Chemistry 3/20/15

Drill • Chem Joke of the Day • The photon checked into a hotel. What did it say when the bellhop asked for its bag? • “No bags—I’m travelling light!” �Phone in the box! �What three things can a mole be converted into? How? �What if you’re converting g L? ? How do moles come into play? �HW: Sodium hypobromite

Objectives �IWBAT �Calculate moles, grams, and particles using the mole triangle �Discuss the “air bag” experiment �Calculate mole ratios for balanced equations �Don’t forget about � 3/23 (Monday!) is our next Lion Time �Mole Project due Tuesday, 3/24

Agenda �Drill �Quiz �HW Review �Finish Lab Qs �More Stoichiometry �Closure

Mole Triangle Quiz �You need �Pencil or pen �Calculator �Green periodic table �Your brain

HW Review �Let’s put up Mole Ratios/ Mole-Mole Stoich problems on the boards

Lab Analysis �On the back of the sheet, copy down the chemical equation. 1. Calculate the moles of Na. HCO 3 used in your MOST successful trial, starting with the mass. 2. Calculate the moles of CO 2 produced from that number of moles of Na. HCO 3, starting with your answer for #1. 3. Calculate the volume of CO 2 produced, if the reaction took place at STP, starting with your answer for #2. 4. Compare the volume calculated in #3 to the volume you measured for the bag. Discuss. 5. Keep this to help with the next activity. Ms.

Investigative Question �What is the process required to calculate the mass, volume, or quantity of particles using various stoichiometric methods?

Mixed Conversions Group Inquiry

Group Work • The class will be separated into small • • groups. Each group will be given a • mixed conversion stoichiometry word problem • white board and marker You will work in your group to solve the word problem. You will have approx. 7 -10 min. to work. When done, write your work, including reaction, units and labels, on a large sheet of paper. Remember to write large

Groups 1 Braswell, Christopher MBurns, Jakim N Yarrish, Stephanie R Thompson, Kayla A Noack, Evan T Fellers, Cassidy GWeir, Kaitlyn M Von Neida, Jacob H 2 3 Rhinevault, Brittany C Johnston, Dylan DJordan, Amoyiah Lou CWatson, Ashley N Maharjan, Bini Sraver, Madison L Blackburn, Brett W 4 Walsh, Tessa J 5 Carpenter, Benjamin J O'Neill, Courtney Faulkner, James P Clary, Anna W Marshall, John N Boyd, Scott C Federline, Brianna K 6

Reminders �Things that might be helpful to look at while you solve your problem: �Mole diagram calculations

To Do List �Tape the word problem to the front of the poster paper. �Write the problem number (in large font) in the top left corner of the paper. �Write your names on the back of the paper. �When you are done, bring the poster paper and marker to the teacher.

Time to Share �It’s time to share with the entire class. �Pick up a copy of the Mixed Conversion Problems worksheet. �You may take notes on the Mixed Conversion Problems worksheet.

Time to Share �I will choose a group to present. �The group will come up to the front of the room, attach the poster paper to the board and then explain how the problem is solved. �Be prepared to explain each step of the problem, including units and labels, and how you know that your process is correct.

Mixed Conversion Problems 1. N 2 (g) + H 2 (g) NH 3 (g) What volume of NH 3 (at STP) is produced if 25. 0 g of nitrogen gas is reacted with an excess of hydrogen gas? 2. H 2 SO 4 (aq) + Na. OH (aq) H 2 O (l) + Na 2 SO 4 (aq) How many molecules of water are produced if 2. 46 g of sodium sulfate are produced in the reaction? 3. H 2 SO 4 (aq) + Na. OH (aq) H 2 O (l) + Na 2 SO 4 (aq) What mass of water is produced if 0. 78 L of sodium hydroxide is reacted with sulfuric acid? 4. Zn (s) + HCl (aq) Zn. Cl 2 (s) + H 2 (g) How many formula units of zinc chloride are produced when 36. 8 L of hydrochloric acid are reacted with zinc metal?

Mixed Conversion Problems 5. Al. Cl 3 (s) Al (s) + Cl 2 (g) How many liters of chlorine gas are produced if 5. 32 x 1025 formula units of aluminum chloride are decomposed? 6. P 4 (g) + H 2 (g) PH 3 (g) How many liters of phosphorous trihydride can be produced during the reaction of hydrogen gas with 0. 084 L of P 4 ? 7. Ag. NO 3 (aq) + Ba. Cl 2 (aq) Ag. Cl (s) + Ba(NO 3)2 (aq) What mass of Ag. Cl can be produced during the reaction of silver nitrate with 7. 9 x 1021 formula units of barium chloride?

Mixed Conversion Practice Complete the practice problems at your desk. We will review as a class

Closure �Cu + Ag. NO 3 Cu(NO 3)2 + Ag �Balance the equation above. �How many moles of silver are produced when 0. 165 moles of copper are reacted with silver nitrate?