Floral litmus solutions

The week of chemistry began with a review of atomic structure which led into a highly abbreviated introduction to bonding and molecules.


Monday began with an introduction to the periodic table and a fast slide into electron orbitals.


Wednesday then focused on orbital filling and the connection to bonding, to chemistry.

Jerome works out whether his flower can detect both an acid and a base

This term I reversed the table order so that the whiteboard, read from left to right, matched the table activity. This worked well.

Dori-Ann makes notes on color changes for her flower.



The floral bleach turned out to be buffered in some way such that the bleach was not basic. That was a fail and will need to be replaced.

Pine Cleen [sic] was a new addition along with the clear Joy detergent (which is neutral). The cream of tartar ran out.

Merenda preps her flower

Franky and Merenda working on identifying unknowns


Board notes




The 11:00 section arrived sans flores. Most of the students used leftover floral pigment solutions. Boiling Sphagneticola trilobata did not yield acid detection capability. Acid only decreases the saturation, not a reliable indicator. The flower does shift yellow to orange in the presence of a base.

Shawn and Ann-Julie

Bredalyn, Delinah, and Rosalyn work out color changes

LcRose, Emelisse, Janice Stacia, and Rosalyn (Bobo, Jan, Dass, Sinotwe)

LcRose

Comments

Post a Comment

Popular posts from this blog

Plotting polar coordinates in Desmos and a vector addition demonstrator

Image
In an earlier post I noted that Desmos did not directly plot polar coordinates. Not only was I incorrect, but Desmos responded to my blog to correct me! Although I had at some point seen that one could define a function f(x)=3x+5 and then have Desmos calculate f(6), I had not absorbed how this might be used to plot polar coordinates. The above works beautifully . Realizing that I could effectively program Desmos, I applied this thinking to demonstrating how to add two vectors when given the magnitudes m and the direction angles theta. The graph calculates the i and j components for the two vectors and then adds the vectors, graphically displaying the result while also providing information on the magnitude and direction of the vector sum. m1 and theta1 are the magnitude and direction angle for one of the two vectors, m2 and theta2 are the magnitude and direction for the other vector. All four are dynamically interactive and can be changed. The diagram purports to illustra
Read more

Setting up a boxplot chart in Google Sheets with multiple boxplots on a single chart

Image
The  Google Statistics  add-on for Google Sheets can display multiple boxplots in a single chart. The key is the layout of the data. One column should be the variable by which the data is to be grouped, the other column should be the data to be box plotted. Set up the Statistics add-on with the data to be plotted as the variable, and the grouping column as the "by" variable. In this image I had deselected all but the boxplot option, the result was the appearance of the Moment, Standard errors, and Confidence intervals options. The default is apparently a 95% confidence interval for the mean. The result is multiple boxplots on a single chart with a common scale. The new tab that is created also quotes 95% confidence intervals for the mean. Note that as of 2018 the Google Statistics add-on cannot be found by search in the add-ons. In addition, as of May 2018 the add-on no longer verifies, possibly due to the add-on not having been updated since August 2017. One may ha
Read more

Traditional food dishes of Micronesia

Image
Clara, Jennette, and Joanie presented ground hard taro cooked in an umw, effectively a hot rock oven. Pohnpeian: rotama. Pingelapese: sero. Mwoakillese: rodma. Mortlockese: Amahd. Kosrae: rodoma. After cooking in an umw the rotama is pounded with the petiole of a palm frond. Rotama is made from hard or swamp taro, known as mwahng on Pohnpei, mweian on Pingalap, pula in Mortlockese, and pahsruhk on Kosrae. In traditional times on the outer islands the women had primary responsibility for tending the taro while the men handled fishing and climbing tasks. Joesen and Noeleen presented fermented breadfruit from the outer islands of Yap such as Woleai and Eauripik. The raw ingredients were actually brought in from Yap, Noeleen prepared the maare.  The leaf wrap is ti leaf - Cordyline fruticosa. Pauleen, Barnson, Trisha, Verginia, Con-ray, and Maylanda from Kitti, Pohnpei brought in mahi umw, koahpnoair koakihr, and uht sukusuk. Above is breadfruit umw, mahi umw, one o
Read more