Floral litmus acids bases

Monday introduced the periodic table of elements, starting with hydrogen and the isotopes deuterium and tritium.

Which was done perhaps more slowly than in past terms. Barely at diatomic hydrogen, the period was nearing an end. 


Hydrogen and some orbital basics were only wrapping up at almost 40 minutes after the hour. This term I remembered to bring electrons using the shatter balls as electrons. These worked rather well, more symbolic than markers.

Monday should end with Lithium, but in an unforced error a jump was to carbon, carbon's p-orbitals, and pairing carbon's unpaired electrons. Molecular chemistry is supposed to hold until Wednesday.


Wednesday saw a backtrack to Lithium, necessary in part due to a quiz question. Then a stretched run back through lithium chloride and carbon dioxide.

Then sodium chloride and finally water. The complexity of the drawings took time. Setting aside the reality of hydronium ions, H+ was presented as a naked ion along with the hydroxide ion. This then flows into the laboratory on the next day.

The kettle was preloaded on Wednesday and stored in the rolling cabinet. Lime was found in the public market Wednesday afternoon. Spathoglottis plicata flowers were gathered in light rain after dark. As a plus the rain and darkness meant almost no ants.

As always, Ixora coccinea produced no aqueous dye.

Sphagneticola trilobata at a high concentration of S. trilobata produced an orange solution. S. trilobata chaned hue to a very faint pink for lime juice and a brilliant deep chrome yellow when treated with dimethyl benzyl ammonium chloride.

The wording "table one", "table two", and "table three" for the physical tables is confusing. Even when the report tables are labelled "data tables." More than one student asked what should go on table three, confusing physical table three with a hypothetical report table three. Although I shifted to north, middle  and south table  that still means two kinds of table are on the board.

The diagram is increasingly evolved term-on-term to cover details and head off misunderstandings.

Right board near class end. 

This term power went off at 11:00 and with that power loss, the water went off. This was a first for laboratory 14. And highly problematic. Given the inability to rinse and reuse the limited number of test tubes, the 11:00 section was done as demonstration only. Water remained off until 2:00 with clean up happening only after the period was over.


Sonya and Susan's outfits mirrored the magenta hues that acids produced.

Brendon and Josh testing unknowns 

Valerina has detection of a base

Aimee records data while Valerina tests unknowns 

Ternajen points at the reaction in a test tube that Arleen has tested for her flower using a known base, 

Ensalyn records data as Angeline tests their flower against a known base.

Angeline loads another test tube

Aiko testing unknowns, Kimberly recording the results.


Aiko and Kimberly 

Valerina testing cream of tartar.

Brendon testing detergent Brendon testing detergent.

Arleen tests a dish soap, Ternajen observes, Ensalyn (in back) records results.

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