Hoffman Electrolysis Apparatus
For qualitative and quantitative study of the electrolytic decomposition of electrolytes such as water, hydrochloric acid etc. Consists of two vertical 50 ml, gas-collecting, graduated glass tubes with stopcocks at top and joined by a bridging tube to a reservoir and fitted with a pair of platinum electrodes at the lower ends of the glass tubes. A lead wire connecting the platinum electrode passes through the glass tube for external connections, so that only the platinum electrode comes in contact with the electrolyte. Packed in a Styrofoam case. Mounted on a cast iron stand designed for safe clamping. Requires a 6V battery or low voltage DC power supply for operation (not included).
Complete unit with Teacher's Guide and reproducible Student Handout.