So acreage copper sound and solution and beaker one. And the solid copper is this electrode bar, the same way that we have the electrode bar this side and acreage copper on this side. And this is our separation of phases. The same concept on this side. This cadmium bar is separated by phases in the solution. So we have the ions here and the solid cadmium in the bar the same way that this bar here, this vertical line represents these two phases.