Hey,
I'm aware of oure cobalt being insoluble to water, but i no it reacts with acid. Basically i have to right up a quick experimental procedure on how it reacts and the outcome, but without actually doing the experiment. Searched online, basically been through everything and i cant find anything to do with cobalt reacting in acids.
If someone has a link or can could just jot down a few lines on what actually happens i would be greatful [: