Q1 : Week 9 – 10/24 – 10/28
Jump to: Tuesday, Wednesday, Thursday, Friday
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If you have not already please join the REMIND for this class.
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10/24 – Monday – A Day – 2, 3a Lab/4 Jump to: Monday Homework
Main focus –
a) To demonstrate a limiting reagent demo – Flaming tube demo
b) To review the stoichiometry of how to determine the Limiting Reagent and the Excess Chemical.
c) To review the Stoichiometry Table in limiting reagent problems
d) To complete the hydrogen balloon analysis.
Period 2/3a:
1. Hydrogen Balloon Demo – In LGI – Which ratio of gases will give us the best cake?
2. Flaming Flask demo with cyclohexane –
3. Conservation of Mass presentation – did not get to
4. Flaming Tube Demo –
a) Which reactant was Limiting the reaction?
c) Calculate the Limiting reagent given the worksheet from homework of the weekend.
d) Use the chart method (Stoichiometry table) to solve the same problem and “see” the ratios.
Limiting reagent intro demo new worksheet.pdf
5) Determine the Limiting Reagent and Excess from the Stoichiometry 3 – ICE Table Molarity Salsa.pdf worksheet using the “chart method”
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Period 4:
1. Video analysis of the Balloon Explosions from Friday
2. Conservation of mass presentation – did not get to
3. Flaming Tube Demo- chart method review.
Conservation of Mass Presentation: applications of balancing chemical reactions
1 : Period 2’s Hydrogen balloon analysis –
1 : Period 4’s Hydrogen balloon analysis –
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10/24 – Monday’s Homework: –
1. Complete the backside of the Limiting reagent intro demo new worksheet.pdf (questions 3 and 4 ONLY) that was homework (front side) from this weekend, using the video posted below. You could try these 2 questions on your own first and then view the video if you are feeling adventurous!
2. Complete the Short Form from a Tall Teacher below: This form is based on a recent free response question. You have 3 submissions to this form. Use the ICE Chart!
1 : Side 2 of Friday’s homework – Teaches the chart method!
_______________________________________________________________ Jump to: Tuesday Homework
10/25 – Tuesday – B Day – 2, 3b Lab/4
a) To Review the ICE table method of determining the limiting reagent.
b) To perform or take notes on a precipitation analysis lab.
c) To begin the conservation of mass presentation – balancing chemical reactions, Stoichiometry of chemical reactions using the mole ratios that we get from balancing
Period 2 –
* Quick look at yesterdays hydrogens explosions using video below.
1. We will review the Limiting Reagent Form 1 with the key below:
Limiting Reagent Form 2021 – Google Forms key.pdf View Download
2. Determine the Limiting Reagent and Excess from the Stoichiometry 3 – ICE Table Molarity Salsa.pdf worksheet using the “chart method”
We determined the Limiting Reagent, excess (and how much), and the amount of product Using the chart method after writing the long hand method that was first taught Last Thursday night.
Last Thursday (without the Chart method) :
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Last Friday with the chart method on the second side:
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View Download
Today (in class and live ) I will model the 1st side with the chart method and particulate diagram of ions
Stoichiometry 3 – ICE TABLE (side 2) – Molarity limiting reagent p.pdf
Period 3b/4 –* Quick look at yesterdays hydrogens explosions using video below.
1. Same as 1 and 2 above.
2. Conservation of Mass presentation – complete –
100% Hydrogen balloon was the Hindenburg
2 : 1 ratio balloon was the The Challenger.
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3b/4 Lab – Lab 8 – Precipitation Analysis of an Alkali carbonate
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1 : Period 2’s Hydrogen balloon analysis –
Conservation of Mass Presentation: applications of balancing chemical reactions
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10/25 – Tuesday’s Homework: –
1. Please complete the Title page, Background, Objectives, Materials procedure, and DATA section for Lab 7 on the shared google that I have SHARED WITH YOU. If you complete this on your own google doc then I will have no access when I grade!
2: Please complete – Stoichiometry 4 – Precipitation – limiting reagent .pdf side one with me with the video below and then complete the side 2 with the key or with second video.
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View Download
2 : Stoichiometry 4 – Precipitation – limiting reagent – side one tutorial.
2 : Stoichiometry 4 – Precipitation – limiting reagent – side 2 tutorial.
_________________________________________________________________________ Jump to: Wednesday Homework
10/26 – Wednesday – A Day – 2, 3a Lab/4
Period 2, 3a –
100% Hydrogen balloon was the Hindenburg
2 : 1 ratio balloon was the The Challenger.
2. Take notes on Lab 8 – Precipitation Analysis – notes and begin.
3. Run Lab 7 – isolate the precipitate and place in oven
1. Take notes on Lab 8 – Precipitation Analysis – notes and begin.
2. Run Lab 7 – isolate the precipitate and place in oven
Conservation of Mass Presentation: applications of balancing chemical reactions
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Lab 8 – Precipitation Analysis of an Alkali carbonate
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Calculations:
Lab 8 introduction – A review of the basic premise of this precipitation analysis lab
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10/26 – Wednesday Homework: –
1. Please complete the Data, Calculations, and Results page of Lab 7 on the Google doc that I shared with you. Guidelines are posted under Last Friday.
2. Please view the Lab 8 – review video below.
3. Complete the form based on Lab 8’s calculations. Today in class you filtered the precipitate unto a known mass of filter paper. I am drying your samples now in the oven. Tomorrow you will subtract the dry mass of your filter paper to get the dry amount of calcium carbonate (chalk!). IN the FORM BELOW WE ARE PRETENDING that we are doing the same lab and will follow the same steps as we did today (with given values of mass of your unknown salt and filter paper). IF you need to please review these calculations with the video below.
2 :Lab 8 review – This might help with your calculations and tonights form!
Jump to: Thursday Homework
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10/27 – Thursday – B Day – 2, 3b Lab/4
a) To complete all calculations of Lab 8 and the error analysis.
b) To perform the analysis of carbonates (Lab 9 ).
c) To demonstrate Bernoulli’s principle (explanation of the aspirator in vacuum filtration).
Period 2 –
1. Complete the data collections of Lab 8 – Our precipitate (CaCO3) is in the oven.
2. Complete the calculations of Lab 8.
3. Identification of Sample A or B – Visual identification of the salts, Q and A of the Lab.
4. Begin Take-home quiz.
Period 3b, 4 –
1. Identification of Sample A or B – Visual identification of the salts, Q and A of the Lab.
2. Bernoulli’s principle demos – Discussion of Bernoulli’s principle in explaining how the aspirator works.
3. Lab 9 – Analysis of Carbonates, lab set-up and data collection.
4. Begin Take-home quiz.
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Lab 9 – Analysis of Sodium Carbonate and Sodium Hydrogen Carbonate
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10/27 – Thursday Homework: –
1. Please complete the Data and Calculations of Lab 8 – due Tomorrow. Please use the video posted yesterday to help with error analysis and/or calculations.
2. Please complete the take-home quiz – due in class tomorrow. Hint:To complete this analysis you need to think how you completed Lab 8 – Precipitation analysis. I have reposted 2 video that will help with your understanding of basic premise of precipitation analysis.
Stoichiometry 4a – Precipitation – limiting reagent – quiz.pdf
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2 :Lab 8 introduction – A review of the basic premise of this precipitation analysis lab. I have it starting at the midway point where I begin my discussion of the lab.
2 :Lab 8 review – this will help with how to calculate with a precipitation lab setup.
________________________________________________________________ Jump to: Friday Homework
10/28 – Friday – A Day – 2, 3a Lab/4
b) To take a surprise quiz
Period 2,3a – Collect Golden Arches Quiz
1. Identification of Sample A or B – Visual identification of the salts, Q and A of the Lab.
2. Bernoulli’s principle demos – Discussion of Bernoulli’s principle in explaining how the aspirator works.
3. Complete the data collections of Lab 9 – The NaCl (aq) solution (product) is being heated to evaporate off the water.
4. Review of Take- Home quiz.
5. Take an in-class quiz on precipitation (surprise?) 🙂
1. Complete the data collections of Lab 9 – The NaCl (aq) solution (product) is being heated to evaporate off the water. – we did not get to this today.. we will complete this Monday..
2. Review of Take- Home quiz.
3. Take an in-class quiz on precipitation (surprise?) 🙂
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Lab 9 – Analysis of Sodium Carbonate and Sodium Hydrogen Carbonate
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Lab 9 review:
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10/28 – Friday’s Homework: –
1. For All Classes – Please complete the Data, Calculations, Results and the conclusion of Lab 8 – due Monday. Please use the Lab 7 review video posted below to help with error analysis and/or calculations.
I also have reposted the Formal Lab REQUIREMENTS BELOW to check you have completed all required sections correctly.
2. Please complete the NEW take-home quiz – due in class Monday. Hint: no hints needed!!
Stoichiometry 4c – Precipitation – limiting reagent 21-22 quiz .pdf
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Maybe reviewing the key to last nights take-home quiz could help. Also Monday nights homework had videos that reviewed these concepts.
Last Nights Golden Arches Quiz Key: Stoichiometry 4a – Precipitation – limiting reagent key p .pdf View Download
3. Please view the lecture below and complete the questions 1 and 2 (on the back) the limiting reagent intro demo new worksheet that was given out last week. It was last weekends homework.
Question 1, 2 of the backside (You did questions 3 and 4 Monday!) uses the concept of equilibrium with our ICE tables.
1 : Lab 7 review – This might help with your calculations!
3 : Side 2 of Friday’s homework – Teaches the chart method!
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Lab 7 – Synthesis of Copper Iodide (and determination of the empirical Formula of copper iodide)
Lab 7 – Synthesis of Copper Iodide.pdf
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This Lab will be our first formal lab. I am giving out a data worksheet to keep you organized in your data collection but it will not be handed in. You will write a data section and calculation section in your formal lab write-up that will be in a google doc that will be shared to you in next couple of days.
Cu (s) + I2 (g) —> Cu? I?
Objectives: 1. To determine the empirical formula of the salt (product).
2. To determine the percent yield of the salt.
The lab will be written up in a shared google doc according the following rubric: