Archive – Q1 week 2 – 19-20
Week of 11/11 – 11/15
Monday 11/11 – Veterans Day – OFF
Tuesday – 11/12 – period 2/3 –
*YOUR TESTS WILL BE AVAILABLE AT THE END OF THE DAY MONDAY!
1: Test 3 – One period Test
2. Lab 11 – Verification of active ingredient in TUMS (antacid)
Pre – Lab
a) active ingredient in TUMS – insoluble base protects lining of esophagus
b) Discussion of asymptote in Titration curves in pool store.
c) how the asymptote impacted my esophagus
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-period 4 –
1: Test 3 – One period test
11/12 – Tuesday – Homework:
1. Study for Test 4 tomorrow! Same type of test as today!
2. Please use your graded test that you can pick up at the end of the day or use the scanned graded test that will be emailed to you to review with the key that is posted in Powerschool or the review video that will be unlocked at the end of today. You could print out a blank copy of the test and redo it.
BLANK TEST 3 –
Test 3 key:
The link for this key will be linked in powerschool.
Lecture on reviewing Test 3:
This video will be unlocked Tuesday afternoon!
End of Tuesday..
Connections!
In Tums we are dealing with the active ingredient, calcium carbonate, CaCO3. Watch out this antacid is an insoluble salt that is found in limestone (sediment rock) and sea shells AND CHALK!!!! It is an antacid because of its basic anion, the carbonate ion, CO3-2 . It is a base because it can accept 2 H+ ‘s (Bronsted-Lowry Base) or it can donate 2 pair of electrons (Lewis Base) to 2 H+ ‘s .
The reaction with carbonates involve probably the most important equilibrium reaction that we have in organic chemistry. Organic Chemistry chemical reactions that support and sustain life. It specifically deals with the Carbon based molecules and the link to the carbon cycle, specifically CO2 (g) as the product of combustion and the reactant in photosynthesis!
The arrows up in the atmosphere are gas molecules of CO2 (g) while the other forms may be CO3-2 (aq), HCO3 -1 (aq), and H2CO3 (aq), or CaCO3 (s).
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In our oceans the movement of carbon through the marine ecosystem can be stored as calcium carbonate, limestone, sedimentary rock or it becoming the shelter that marine organisms use for protection (phytoplankton, sea shells, coral reefs, etc). As the diagram illustrates these reactions are in equilibrium. The Carbon cycle in out oceans is very similar to the carbon transport system in our blood , EXCEPT we do not make an insoluble precipitate, CaCO3 (s). |
In our bodies we must get rid of the carbon dioxide that is released as a by – product of cellular respiration. We dissolve the CO2 (g) in our plasma (water part of out blood) and because of fact that CO2 (g) is Lewis acid it lowers our blood pH which will force us to breath.
Not only does equilibrium system help transport CO2 (g) out of the body through the plasma it also serves an important blood buffer that keeps you blood at a pH of about 7.4.
Mechanism of how Carbonic acid can be decomposed back into water!
Wednesday 11/13 – period 2 –
1. Test 4
period 2/3-
1. Test 4
2. Lab 11 – Verification of active ingredient in TUMS (antacid)
Pre – Lab
a) active ingredient in TUMS – insoluble base protects lining of esophagus
b) Discussion of asymptote in Titration curves in pool store.
pH up and pH down
c) how the asymptote impacted my esophagus
Milk of Magnesia Demo:
Wednesday 11/13 – Homework:
1. Please complete the EXTRA Credit Form below:
You will have 2 graded responses for this form, which is on auto-grade.
I will add the better of the 2 responses to this form IN PLACE OF YOUR RAT QUIZ GRADE!
End of Wednesday….
Optional homework for Rose:
1. Please complete the following worksheet and review with the key:
Thursday 11/14 – period 2/3
1. Review of Test 3.
2. Lab 11 – Note-taking
Yesterdays notes on the lab:
2. Interpretive Dancing
period 4
1. Review of Test 3.
2. Lab 11 – Note-taking
Thursday 11/14 – Homework:
NONE!!!!
Friday 11/15 – period 2
1. NOTES OF THE Standardization of NaOH with KHP
2. Standardization of NaOH with KHP
– we determined the actual concentration of the NaOH solution that I tried to make .50M
– Most got 0.47 M due to the reactivity of NaOH with water and carbon dioxide.
period 3/4
1. Complete the Notes on the TUM’s Lab up till the Standardization of NaOH
1. NOTES OF THE Standardization of NaOH with KHP
3. Standardization of NaOH with KHP
– we determined the actual concentration of the NaOH solution that I tried to make .50M
– Most got 0.48 M due to the reactivity of NaOH with water and carbon dioxide.
Friday 11/15 Homework:
1: Formal Lab 11 write-up with complete Background, Procedure,
Data table design, and some calculations.
a) Background – A full page single typed. There is so much to write about. Do not forget to direct your discussion toward the Objective (which is to determine the milligrams of calcium carbonate in TUMS).
b) Detailed written procedure – There are 3 parts to your procedure.
( I will be scrutinizing your procedure and the conclusion)
The procedure has 3 parts!he-
1) Design of the lab.
2) Preparation of chemicals necessary to perform Back – Titration on 2 tabs of
750 mg TUMS (calcium carbonate = active ingredient)
3) Actual Steps taken to perform the lab in order to calculate the mg of active ingredient in 2 tabs of TUMs.
a) Standardization
c) calculations – Neatly presented – I have a video below that reviews how to complete the
calculations below.
So far you only have the calculations for the standardization and the calculations for the making of the solutions needed in your design.
d) data table (typed)
DESIGN YOUR DATA TABLE, BASED ON YOUR STEPS in the procedure that describes what you need to do to completely determine the milligrams of calcium carbonate in your TUMS tablet.
This will help you understand the Lab better and give you a head start to what we will do Monday when we Titrate the TUMs.
This Part Below is not due yet!
e) Results –
f) Conclusion – Please describe all errors and completely analyze you errors. It is a very accurate lab, all volumetric titrations are if the done precisely with standardized chemicals, However they are numerous errors to discuss and analyze.
Also try to discuss why your tablets milligrams of CaCO3 was not 750 mg in terms of the company that makes them (GSK).
g) Sources
I have a review video for this lab that was made last year with different concentrations:
The process is the same.
End of week 2!