This demonstration shows the construction of of an eleven foot high barometer made with a concentrated solution of potassium tetraiodomercurate(II).
As the raft of bubbles is stressed with the slider, dislocations move into and out of the grains and their boundaries.
The conductivities of a sulfuric acid solution and a barium hydroxide solution are tested, and will be the basis for monitoring a simple titration.
Comparing the densities of mercury, potassium tetraiodomercurate(II) solution, and water illustrates that barometers made from the three liquids have different heights.
A supersaturated solution of sodium acetate is poured onto a small sodium acetate crystal, and the liquid crystallizes immediately upon contact in an exothermic process.
As a barium hydroxide solution is added to a sulfuric acid solution, the solution's conductivity gradually decreases. When the acid is consumed, the conductivity approaches zero, then rises again as more base is added.
Extraction of an acid with a base using a separatory funnel is demonstrated. In this initial step, the aqueous and organic solvents along with an indicator are added to the funnel.
Extraction of an acid with a base using a separatory funnel is demonstrated. In this step, aqueous base is added and the result noted.