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The image shows an open textbook, likely a science or chemistry book, with diagrams and text. The primary focus is on the preparation of carbon dioxide (CO2) gas. **Objects:** * **Diagram 1 (Fig. 8.9 (b)):** This diagram illustrates an experimental setup for preparing dry carbon dioxide. It includes a flask containing potassium hydrogen trioxocarbonate (IV), a delivery tube leading to a U-tube filled with fused calcium chloride, and another tube to collect the dry CO2. The diagram labels are "Carbon (IV) oxide," "Potassium hydrogen trioxocarbonate (IV)," and "Fused calcium chloride." * **Diagram 2:** This diagram shows another setup involving a flask with marble chips, a dropping funnel for dilute hydrochloric acid, and a delivery tube leading to a gas jar where moist CO2 is collected. Labels include "Dilute hydrochloric acid," "Marble chips," and "Moist CO2." * **Text:** The page contains explanations, experimental procedures, results, conclusions, and chemical reactions related to carbon and its compounds, specifically carbon dioxide. **Text Visible:** * "Fig. 8.9 (b): To prepare dry gas" * "Potassium hydrogen trioxocarbonate (IV)" * "Fused calcium chloride" * "Carbon (IV) oxide" * "Result: Effervescence occurs as the acid reaches the marble. Carbon (IV) oxide is evolved and it is collected in a gas jar." * "Conclusion: Carbon (IV) oxide is prepared by the reaction between a dilute acid and calcium trioxocarbonate (IV)." * "Dilute tetraoxosulphate (VI) acid is not used in the preparation of carbon (IV) oxide because it coats the marble chips with a layer of insoluble calcium tetraoxosulphate (VI) which prevents further reaction." * "Other reactions under which carbon (IV) oxide is also produced are:" * "1. Action of heat on metallic trioxocarbonates- (IV) (except those of sodium and potassium) or the hydrogen trioxocarbonates (IV) of sodium or potassium." * "2. Complete combustion of hydrocarbons." * "3. Reduction of metal oxides by carbon" * Chemical equations like: * "2NaHCO3(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(1) + CO2(g)" * "CuCO3(s) → CuO(s) + CO2(g)" * "CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)" * "ment 8.4: Preparation of Carbon of CO2" * "with strong" * "carbonyl" * "oxide" * "The gas is" * "e.g., 8.9 (a): Laboratory preparation of CO2" * "Water" * "155" The scene is a static representation of educational material. There are no people, animals, or explicit setting cues like a specific room or outdoor environment, beyond what is depicted in the diagrams. The context implies an academic
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