The H+ hydrogen ions in the water react with the cathode (negatively charged electrode) to produce electrons to form molecular hydrogen H2. The remaining OH- hydrogen ions make the water more alkaline around the cathode. In contrast, the hydrogen ions approach the anode (positively charged electrode) and transfer electrons to the anode, eventually forming O2 (oxygen gas). The remaining hydrogen ions make the water around the anode acidic. The two types of water are separated by the membrane and released through different hoses.
