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That in the syllabus?Xayma said:Limestone is CaCO<sub>3</sub>
It just pushes the reaction to the left ie.
CO<sub>2(g)</sub>+3H<sub>2</sub>O<sub>(l)</sub> <-----> CO<sub>2(aq)</sub>+3H<sub>2</sub>O<sub>(l)</sub> <-----> H<sub>2</sub>CO<sub>3(aq)</sub>+2H<sub>2</sub>O<sub>(l)</sub> <-----> HCO<sub>3(aq)</sub><sup>-</sup>+H<sub>2</sub>O<sub>(l)</sub>+H<sub>3</sub>O<sub>(aq)</sub><sup>+</sup> <-----> CO<sub>3(aq)</sub><sup>2-</sup>+2H<sub>3</sub>O<sub>(aq)</sub><sup>+</sup>