Week of 10/21 – 10/25

10/21 – Monday – period 2

1.  Measured Dried precipitate from Lab 7

2.  Completed New Page 2 from Lab 7 –
Working from the mass of the product (CaCO3) you can complete the Stoich table \
of the precipitation reaction.

3. Started the Quiz (stiochiometry 4c)

period 3/4 –

1. Lab 7  – Precipitation analysis of unknown carbonate – overview – lab Explained.

a) Filter the precipitate made Friday with Buchner funnels
b) place wet precipitate in microwave for page 2.

While the precipitate is drying in microwave:
a) Bernoulli’s Principle – Demos  – explanation of  how the aspirators work.

2.  Completed New Page 2 from Lab 7 –
Working from the mass of the product (CaCO3) you can complete the Stoich table \
of the precipitation reaction.

3. Started the Quiz (stiochiometry 4c)

10/21  –  Monday Homework:
1.  Using the knowledge of how to complete Lab 7, the lab handout given out last Friday, and the 2 Lab 7 review videos below, complete the Form below (the videos).
Lab 7 – Gravimetric analysis of a metal carbonate new.pdf
Lab 7 – Gravimetric Lab Review:
Review of Lab (do not worry if the Lab number is correct).
Procedure of Lab 7 explained – Gravimetric Analysis of a metal carbonate:

Lab 7 Form: Gravimetric analysis of a metal carbonate.

Gravimetric Analysis Lab Form 1920

End of Monday!!

10/22 – Tuesday – period 2/3

1. Complete Quiz that was started yesterday

2.  Complete Lab 8 – Gravimetric Titration of a Metal Carbonate
(These are the steps that you used to complete last nights homework!!!)

A.  TAKE out the precipitate (calcium carbonate) and carefully mass out the filter paper and
precipitate.  DO NOT MASS OUT THE WATCH GLASS.

B. Calculate the moles calcium carbonate – Use stoichiometry to relate the moles of the precipitate to
the moles of the original salt (unknown metal carbonate).

C.  Calculate the Molecular Mass/Formula Mass of the salt now that we know the grams of the
original dried salt (that was measured in the beginning after it was microwaved) and the moles of
the original salt that was determined above.

D.   Determine the unknown formula of the salt given that the metal in the salt could only be
Li,  Na, or K. Remember that your experimental value will be greater than the molecular/formula
masses of the known salts because the moles determines from the experiment are undervalued.

E.  Determine the theoretical mass of the precipitate (calcium carbonate) that would be
produced using the step E and F above. Show all work!

F.  Calculate the percent yield and percent error using the theoretical value above.

G.  Complete the diagram on the bottom of the second page that illustrates all compounds in
the solution before you filtered out the precipitate.

3. Use the specimen scopes to view the Salt A/B
4.  Start Analytical Quiz 2 – Golden Arches

period 4 –

1. Complete Quiz that was started yesterday
2.  Complete Lab 7 – Gravimetric Titration of a Metal Carbonate
(Steps above posted in period 2/3.)
(These are the steps that you used to complete last nights homework!!!)
*Use dried precipitate that was in the oven overnight for your experimental values of the precipitate.

3.  Analytical Quiz 2 –  Golden Arches
10/22 – Tuesday -homework: Lab 7 due Thursday

1. Complete all calculations of Lab 7 and complete conclusion for period 2/3 CLASS ONLY!

2.  Please review the quiz with the key that will be posted in the Power School in the afternoon.
3. Complete the NEW Take home quiz (Golden Arches) that was given out in class.
End of Tuesday!

10/23 – Wednesday –  period 2 –

1.  Hand back and REVIEW of Stoichiometry 4c quiz:

Stiochiometry 4c – Precipitation – limiting reagent key p .pdf

a) Stiochiometry Ice Table Molarity Salsa review – Last Thursday’s Homework

Stiochiometry 3 – ICE Table Molarity Salsa key BEST p.pdf

b) Weekend homework review:

Stiochiometry 4 – Precipitation – limiting reagent Key p.pdf

2. Classwork –  Equilibrium Constants determining the “amount of completion”.

We will complete questions 1 and 2 on the backside of this worksheet that we started last week.

Limiting reagent intro demo new worksheet.pdf
period 3/4 –

1.  Hand back and REVIEW of Stoichiometry 4c quiz:

Stiochiometry 4c – Precipitation – limiting reagent key p .pdf

a) Stiochiometry Ice Table Molarity Salsa review – Last Thursday’s Homework

Stiochiometry 3 – ICE Table Molarity Salsa key BEST p.pdf

b) Weekend homework review:

Stiochiometry 4 – Precipitation – limiting reagent Key p.pdf

2.  Complete Lab 7 – Gravimetric Titration of a Metal Carbonate

3. Classwork –  Equilibrium Constants determining the “amount of completion”.

We will complete questions 1 and 2 on the backside of this worksheet that we started last week.

Limiting reagent intro demo new worksheet.pdf
10/23 – Wednesday – Homework:

1. Please complete the following worksheet that was given out in class:

This worksheet has the errors fixed that are posted below:

Stoichiometry 4d – Equilibrium and Stoichiometry .pdf

In the worksheet I gave out today I forgot to include the data you need to answer 2f:

I also messed up question 3:  My chemicals are not typed clearly in your worksheet handed out.

IN spite of me YOU CAN LEARN!!!!!

2.  Please review with the key.

Stoichiometry 4d – Equilibrium and Stoichiometry key p.pdf
3.  Lab 7 – conclusion writing.. Lab is due Thursday..
End of Wednesday!

10/24 – Thursday –  period 2/3-

1. Hand back and review Analytic Quiz 2 – golden arches investigation

2. Homework Review Keq, Q, and stiochiometry

3. Started Test (pages 1 – 4) in class.

4. Lab 8 – Analysis of Carbonates- Determination of sodium carbonate or sodium hydrogen carbonate
baking soda                           washing soda
Added HCL on Sample A or Sample B
Evaporation of water to obtain mass of product (NaCl)

period 4 –

1. Hand back and review Analytic Quiz 2 – golden arches investigation

2. Homework Review Keq, Q, and stiochiometry

3. Started Test (pages 1 – 4) in class.

10/24 – Thursday homework:

1.  Page 1 and 2 (PART 1) of the Test 2.
Due in class tomorrow..
2.  Lab 7 is due!

End of Thursday…

10/25 – Friday –  period 2 –

1. Hand in Part 1 – pages 1 & 2
2. Lab 8 – calculations – measure grams of NaCl collected.

3.  TEst – next part given out.
period 3/4 –

1. Hand in Part 1 – pages 1 & 2

2. Lab 8 – Analysis of Carbonates- Determination of sodium carbonate or sodium hydrogen carbonate
baking soda                           washing soda
Added HCL on Sample A or Sample B
Evaporation of water to obtain mass of product (NaCl)

3. TEST 2  – next part given out.

10/25 – Friday – Homework:

1.  Part of TEST 2.
Due in class Monday!

End of week 8!