Ashley Marie Johnson was a part-time care worker at a group home in North Battleford that cares for people with intellectual and physical disabilities.
Mounties charged her with assault and of administering a noxious substance.
Johnson was 24 at the time of the incident.
The person suffered non life-threatening injuries, though has since fully recovered.
The trial will be at the Battleford Court of Queen's Bench, but the dates have not yet been finalized.