Periodic table and floral litmus solutions

Monday saw a correction to spring 2025 when the lecture moved all too quickly into bonding. Monday started with hydrogen. Then deuterium and tritium were covered. Following this diversion into isotopes, Helium was diagrammed. Helium introduced electron spin and the idea of full shells.

S, p, d, f orbitals were briefly mentioned, the Lithium was diagrammed. This wrapped up the period on Monday. This approach permitted time to introduce concepts. 


Wednesday was used to introduce bonding, starting with hydrogen-hudrogen. The shatterballs were used. 


Starting from hydrogen the jump was made to carbon. Methane was diagrammed followed by ammonia.


Then carbon dioxide was attempted. Running low on time and board space, water was the final diagram. Hydrogen ions (protons) and hydroxide ions were covered next. This segued into a definition of acid and bases. Once again the reality of hydronium ions was skipped over.

On Thursday a solo on time arrival provided time to set up the board. Careful compression put everything on the left board.

As soon as I had arrived in the morning I set up the tea kettle with water, the hot plate set to high. The third lab bench was not set up until after 8:00. This term I referred to to the lab tables as lab benches in the hope of reducing confusion between data tables and lab tables. Data table one pairs with lab table two. Perhaps the solution is three tables in the report. The first table could be the name of the flower along with the original color of the flower. Then table two can be the current table one.

I had planned to bring a pH meter from the botany kit but then forgot.

Lanve with early results 

LizzyAnn testing for a color change due to the addition of citric acid provided by local limes.

Leann studies the results of testing her floral litmus solution.

LizzyAnn with detection of a known acid.

The unknowns have gradually expanded over the terms. The unknowns that were not intended to be used were left in the plastic box on the table. As a result many students tested those substances as well. Note that the shampoo needs replacing with something less goopy. That shampoo can no longer be washed out if the test tubes.

Lanve recording data. Note that only thr morning class brought flowers. No one in the afternoon class did so.


Bennie takes down notes.


Lashanna, Leann, Finolla, Austin


Austin testing unknowns 


Bennie testing unknowns 


Lashanna and Finolla team up work on conclusions

Left board at 11:05. Weather has meant students arrived as late as 10:00. This session went to 10:45.

Center panels

Meramy has clear indications of an acid, but the color change for a base were more subtle. Hibiscus rosa-sinensis did not perform as well as Spathoglottis plicata and Coleus scutellaroides.

Lousaintra checking results for an unknown.

Jay-brion, Kealoha, KC


Meramy, Jay-brion, Ariana 


Jay-brion and Ariana test unknowns.

Ariana


Valencia 

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