November 20, 2013
(2 Oct. 2012) --- Japan Aerospace Exploration Agency astronaut Aki Hoshide, Expedition 33 flight engineer, performs a removal and replacement of the DKiV water pump and the E-K pre-treat tank with its hose in the Tranquility node of the International Space Station. E-K contains five liters of pre-treat solution, i.e., a mix of H2SO4 (sulfuric acid), CrO3 (chromium oxide, for oxidation and purple color) and H2O (water). The pre-treat liquid is mixed with water in the DKiV dispenser and used for toilet flushing.
Topics: Matter, Spaceflight, Chemistry, Sulfuric acid, Tranquility, 14926 Hoshide, Akihiko Hoshide, Chromium, Human spaceflight, Oxidizing agents, Oxides, bathrooms