JOURNAL OF CHEMICAL EDUCATION
ELECTROLYTIC CONDUCTIVITY APPARATUS JOSEPH S. SCHMUCKLER and ROBERT C. SCHENCK Haverford Senior High School, Havertown, Pennsylvania
THEchemistry teacher is ever on the alert for new and better ideas to demonstrate basic principles of the science. The authors have devised a simple, effective apparatus which will demonstrate the conductivity of salts when fused in the solid state, in solution, and in varying degrees of dilution. The Suter-Kaelber conductivity apparatus1 is not easily adaptable to a full demonstration of all of the experiments that should be done to illustrate conductivity phenomena. It is often important to emphasize the contrast between the conductivity of a dry salt and its aqueous solution. The authors have combined the Suter-Kaelber apparatus with the conventional type by connecting the pairs of electrodes in parallel through a switching mechanism. By mounting the entire assembly against a black background on a ring stand as shown in the figure, the wiring diagram is apparent. 'SUTER, H. A,, AND L. I(AELBER,J. &EM. EDUC., 32, 640 (1955).
