IUPAC (International Union of Pure and Applied Chemistry) has officially approved the name flerovium, with symbol Fl, for the element of atomic number 114 and the name livermorium, with symbol Lv, for the element of atomic number 116.
As part of the grade 12 equilibrium unit, I have my students perform a very traditional lab activity demonstrating Le Châtelier's principle. They rotate through a series of stations where they use a semi-microlab approach to investigate a different equilibrium system at each one.
Materials science is the study of our material world. It is using knowledge of the structure, bonding and properties of a substance to optimize its performance in a specific function.
This last article of a three-part series describes how to use syringes, pressure gauges and Mason jars to do the gas laws: Boyle’s Law (pV), Gay-Lussac’s Law (pT) and Avogadro’s Experiment (pn). The huge advantage of using a Mason jar for the pressure vs amount relationship is that the stopper and ring combination produce a sealed container that can withstand a pressure inside of 2 atm without fear of the stopper popping or the glass breaking.
This second article in a three-part series on gas laws describes how to use a Mason jar to collect data and demonstrate the pressure-temperature relationship, Gay-Lussac’s law. Its huge advantage is that the gas temperature is measured, NOT the temperature of the water bath.
This three-part series will describe how to use syringes, pressure gauges and mason jars to study gas laws — Boyle’s law, Gay-Lussac’s law and Avogadro’s law. Most likely you did not learn the properties of gases using mason jars, syringes and pressure gauges.
In this article two example applications of gravimetric titration — acid content of fruit juices/soft drinks and pH titration curves — are presented. Both are suitable for laboratory experiments in senior secondary school chemistry courses or in college general chemistry courses.
Chemical reactions are the most exciting part of chemistry class. Over the past five years I have developed an experience-based chemical reactions unit that features instructional videos coupled with a small group laboratory experience, whole-class demonstrations, and an interactive “demo test” as a final assessment.
How great is it for students to get to experience working in the lab, all while creating a useful piece of lab equipment that can be used for the remainder of the school year? Within the first month of school, my 10th grade chemistry students perform a series of lab experiences. They practice techniques such as heating a test tube, reading a thermometer to the proper number of digits and — always a student favorite — making their own glass stir rod.
Why does one attend ChemEd? Welllll (good Texas word!), one just never knows what is going to be shared. At this year's ChemEd in Brookings, South Dakota, at South Dakota State University, we suffered from curiosity.