Pure CO2 may be prepared by treating limestone with aqueous sulfuric acid. The limestone used contained CaCO3, MgCO3 and inerts. The acid used contained 12% H2SO4. The residue from the process had the following composition: 8.56% CaSO4, 5.23% MgSO4, 1.05% H2SO4, 0.53% inerts, 0.12% CO2, and the rest water. During the process the mass was warmed and CO2 and water vapor were removed. Calculate:
(Material Balance
Pure CO2 may be prepared by treating limestone with aqueous sulfuric acid. The limestone used contained CaCO3, MgCO3 and inerts. The acid used contained 12% H2SO4. The residue from the process had the following composition: 8.56% CaSO4, 5.23% MgSO4, 1.05% H2SO4, 0.53% inerts, 0.12% CO2, and the rest water. During the process the mass was warmed and CO2 and water vapor were removed. Calculate:
(a) Analysis of the limestone
(b) % excess acid used
(c) wt and analysis of the material distilled from the reaction mass per 1000 kg of limestone treated.
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