{"knowledge_schema": {"broad_category": "Chemistry \u2192 Organic Chemistry \u2192 Reaction Mechanisms", "refinement": "This problem involves understanding the reactions of organic compounds, specifically the decolorization of bromine water and the process of disproportionation.", "specific_scope": "The focus is on the behavior of two liquid mixtures during chemical reactions, including hydrogenation and the formation of a hydrocarbon with a specific mass fraction of hydrogen.", "goal": "Determine the total number of hydrogen atoms in the two liquids of mixture X based on the provided information about their reactions and the resulting hydrocarbon."}, "summary": "This chemistry problem involves analyzing the reactions of two liquid mixtures, X and Y, with bromine water and platinum under heating. Mixture X decolorizes bromine water, indicating the presence of unsaturation, while mixture Y does not. The hydrogenation of both mixtures leads to a hydrocarbon Z with a specific mass fraction of hydrogen. The goal is to calculate the total number of hydrogen atoms in the two liquids of mixture X, which is determined to be 18."}