The small balloon in a syringe for demonstrating Boyle’s law can be substituted with an air-containing, cut and knotted finger of an exam glove.
The Poly Density Bottle1 is a fascinating demonstration primarily due to the phenomena being counterintuitive to what one would expect. The bottle containing white and blue beads suspended in a clear and colorless liquid is shaken vigorously, distributing the beads randomly throughout.
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.
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.
The “Burning Steel Wool” demonstration is an engaging means to illustrate that increasing the amount of available oxygen increases the rate of combustion. A 9-volt battery is used to ignite a small piece of steel wool, first in air, and then in an oxygen-enriched environment.
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.
The initial response of the Fourth Form Chemistry Group (14/15-year-olds) to the prospect of writing a chemistry poem for homework was one of bemused horror and disbelief.