Abstract: A reactor microplate that allows for a researcher to perform a multitude of experiment in micro-gravity without risking potential exposure. The microplate includes a planar housing and an at least one chamber-mixing assembly. The chamber-mixing assembly includes a first retaining mechanism, a second retaining mechanism, a mixing channel, and an activation valve. The first retaining mechanism and the second retaining mechanism house solutions for an experiment and are positioned offset to each other, across the planar housing. The mixing channel fluidly couples the first retaining mechanism to the second retaining mechanism. Specifically, the mixing channel traverses into the planar housing from the first retaining mechanism to the second retaining mechanism. The activation valve is mechanically integrated in between the first retaining mechanism, the mixing channel, and the second retaining mechanism to control the flow of fluids in between the first retaining mechanism and the second retaining mechanism.