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  Q1 : Week 10  – 11/6 – 11/10

<- Week 9 –  Week 1 (Q2) ->                                                                                                                          Jump to:  Tuesday,   Wednesday,  Thursday,   Friday 

Refresh this page every time you arrive!  I update this daily!!!

If you have not already please join the REMIND for this class. 

Please Make sure Your read all instructions for all assignments.    

LAB 7 – Empirical Formula of copper Iodide is due Friday !

Labs 1,2,3,4,5,6,8,9 are Late!  

 _____________________________________________________                                                        Jump to:  Monday Homework         11/6 – Monday – B Day – 2, 3b/4 Lab

Main focus – 
 

a) To complete Lab 9                                                                                                                                          b) To review Precipitation Analysis- quiz                                                                                                    c) To begin the Analytical Chemistry Test 

Period 2:

1.  Review of Take – Home quiz (2nd) – purple.

2.  Analytical Chemistry Test begins.

a) Completed question 2 of part 2 – Precipitation question (like the last 2 quizzes).

b) start the Multiple Choice

c) Pulled question 1 of part 2 – combustion analysis question – take home portion 

Period 3b:

1.  Identification of Sample A or B – Visual identification of the salts, Q and A of the Lab.    

2.  Complete the data and calculations of Lab 9 – The NaCl (aq) solution (product) was heated to evaporate off the water.

a) measure the evaporating dish with dried salt.

b) subtract the mass of evaporating dish and determine the identity of the unknown based on stoichiometry calculations.

3.  Review of Take -Home quiz (2nd) – purple.

                                                                                                                                                                                 Period 4 :                          

2.  Analytical Chemistry Test begins.

a) Completed question 2 of part 2 – Precipitation question (like the last 2 quizzes).

b) start the Multiple Choice

c) Pulled question 1 of part 2 – combustion analysis question – take home portion 

   

.______________________

Lab 9 – Analysis of Sodium Carbonate and Sodium Hydrogen Carbonate 

Lab 9 – Determine the identity of the carbonate by reacting the 2 salts with HCl to produce NaCl.  How much NaCl is made will determine the identity of the salt.   
 
            The salts are either:          Na2CO3     –   sodium carbonate –  washing soda   
                                                                 NaHCO3    –   sodium hydrogen carbonate –  baking soda                                                                                                                                                                                            This a NOT a precipitation analysis lab but it an Analytical Lab as we will use stoichiometry to identify the starting salts by using how much NaCl is produced by reacting them with HCl.                                                                                                                                               
LAB 9 – Unknown carbonates Lab.pdf
View Download
     
Data gathering for Lab:
    a) mass out unknown carbonates A or B in an evaporating dish
    b) add excess HCl till the reaction reaches completion.
    c) place the evaporating dish on a hot plate under the fume hood (evaporating off the water to recover NaCl)
Today:
 
     d) MASS OUT the evaporating dish and the dried NaCl (aq) 
     e) Determine the experimental mass of NaCl.
     f) Determine the Theoretical mass of NaCl produced from each of the possible 2 chemical reactions.
     g) Identify the unknown salt based on your calculations.  

  

Lab 9 review:

 

____________________________________________________                                                                                             jump to:  top                 11/6 – Monday’s Homework: – 

1. Please review your 2 last take-home quizzes with the keys.

Golden Arches Quiz:
Stoichiometry 4a – Precipitation – limiting reagent Key p .pdf
View Download

Blank:                                                                                                                Stoichiometry 4a – Precipitation – limiting reagent – quiz.pdf                                                              View Download

Purple Colored Quiz:                                                                                    Stoichiometry 4c – Precipitation – limiting reagent key p .pdf                                                                      View Download:

Blank:                                                                                                                      Stoichiometry 4c – Precipitation – limiting reagent 21-22 quiz .pdf
View Download

2. Please complete the take home portion of the test (question 1 – part 2) that you pulled from your folder today.

This is a combustion analysis question with precipitation analysis to determine the empirical formula of the compound. I am reposting the worksheets and the coorresponding videos that we have previously used if you need to review.  Do not forget it is not what you do first but what you do last! 

Lecture 0a below reviews combustion analysis.

Lecture 1.2 below reviews combustion analysis with precipitation analysis

Your take home question has combustion analysis and precipitation analysis combined.We completed these questions in week 8!

Combustion (burning):  
A redox reaction (imagine that) that uses O2 as the oxidizing agent on a fuel (normally a hydrocarbon)
 
                                             C?H?   +    O2    →   CO2     +     H2O
 
                                                      Notice that combustion is a redox reaction.
 
Using the law of conservation of mass by Lavoisier and the idea that every unique compound has a unique formula (law of definite proportions by Proust) we can determine the chemical formula of hydrocarbon fuel if we have the mass of the CO2 and  H2O that is produced.  All the carbon from the unknown combines with the oxygen to make CO2 and all the Hydrogen from the unknown comes combines with oxygen to make water.
  

AP Lecture 0a : Calculating chemical formulas from Combustion analysis (that are obtained through labs). 

This video review question 3 of the  Analytical Chemistry I KEY- determining chemical formulas.pdf 

Analytical Chemistry II – Mol,Dilution, precipitation analysis.pdf
View Download 
 
Analytical Chemistry II KEY NEW – Mol,Dilution, precipitation analysis.pdf
View Download

Make New Video for Combustion analysis for next year for multiple samples.

 

 b) Lecture 1.2 : Precipitation analysis 

This video reviews these worksheets you should focus on the last 2 questions of side 2:

Analytical Chemistry II – Mol,Dilution, precipitation analysis.pdf
View Download 
 
*Check out question 4
Analytical Chemistry II KEY NEW – Mol,Dilution, precipitation analysis.pdf
View Download

 

 

________________________________________________________________________                               Jump to:  Tuesday Homework / top 11/7 – Tuesday  – Superintendents Day – OFF                                        

                                                                 Main focus –                                                                        

a.p. bio school GIF by NBC

       a) Students – To Sleep later.

       b) Me – Learn to be a better teacher – 

       c) Let me know if you have any questions? 

 

                                                                                                                   

____________________________________________________                                                                             jump to:  top                     11/7 – Tuesday’s Homework: –

                                                                                                                                                                                      1.  See Monday’s homework above.

                               

 ___________________________________________________________________________               Jump to:  Wednesday Homework / top  11/8 – Wednesday – A Day – 2/3a Lab, 4

Main focus –          
 
a)  To continue with our Test 2 – Analytical Chemistry
 

*You may return to your folder at anytime between today and tomorrow during your off-periods or extra help to work on your test. You can go back to any part of the test EXCEPT for the parts that I am collecting  (Question 1 – part II today, Question 9, part 2 – tomorrow).

Period 2,3a – 

1.  Collect Question 1 of Part 2.  

2.  Part 1 – (pages 1 – 4) and Question 2 of part 2 will be pulled from folders after today.

Period 4 – 
1.  Collect Question 1 of Part 2.  

2.  Part 1 – (pages 1 – 4) and Question 2 of part 2 will be pulled from folders after today.

 
                                                                                                                       

_______________________________________________________                                                                 Jump to:   top                      11/8 – Wednesday Homework: –

1.  Question 9 – is the take-home portion tonight.  It is due at the start of the class tomorrow.

This question is a lot like our precipitation Lab 8. I have re-posted the video that explains Lab 8 which maybe helpful.

Remember it is what you do last to help get yourself started!

Lab 8 review – 

 

_______________________________________________________                               Jump to:  Thursday Homework /top  11/9 – Thursday – B Day – 2, 3b/4 Lab                                                                                                  

Main focus –     
                                                                                                                                               

a) To complete Test 2.

b) To dance and frolic when you are done.

                                                                                                                                                               

Period 2,3,4 – 

1.  Complete Test 2

LAB 7 – Formal Write up is due Monday if Needed!

Please use the resources posted below to help with writing the conclusion:

Formal Lab Write-up Instructions: https://mrgrodskichemistry.com/lab-7-formal-write-up/

 

                                                                                                 

_____________________________________________________                                                                        jump to:  top                             11/9 – Thursday Homework: –  

The homework is very light this weekend:                                                                Read below:

There is no homework this weekend!

                               🙂 

___________________________________________________________________________________                                      Jump to:   top                        11/10 – Friday – Veterans Day – OFF – enjoy! 

 
End of Quarter 1!