Abstract: An apparatus for dissolving zinc by means of acid-containing liquid electrolytes includes a container for zinc particles to be dissolved, inlet and outlet devices for continuously admitting and discharging fresh or zinc-enriched electrolytes, and collecting and discharging devices for the gases produced during the dissolution of zinc, such as, hydrogen. The apparatus container for receiving the electrolyte has in its lower portion an intermediate screen floor for placing the zinc particles filling thereon. The inlet devices for the fresh electrolyte are arranged below the intermediate screen floor. An overflow for the zinc-enriched electrolyte is arranged in the upper portion of the container. Filters and catch containers are arranged following the overflow. A gas collecting chamber with discharge device is arranged above the apparatus container.