Chemical Production Processes and Systems. Chemical production processes are provided that include replacing a halogen of an unsaturated halocarbon to produce an unsaturated hydrohalocarbon. Chemical production systems are provided that include a reaction zone coupled to first and second reservoirs, the first reservoir containing an unsaturated halocarbon and the second reservoir containing a hydrogenating reagent with the system being configured to expose the unsaturated halocarbon of the first reservoir to the hydrogenating agent of the second reservoir within the reaction zone.