Help with chemistry please!! When the mineral dolomite (CaCO3?MgCO3) is heated, it gives off carbon dioxide and forms a mixture of a metal oxide and a metal carbonate. Which oxide is formed?1. MgO2. CaO2.3. CaCO4. Ca2O5. MgCO6. MgCO37. MgCO28. CaO9. MgO210.CaCO3
M(CO3)(s) ? Δ ? MO(s) + CO2(g) K p(CO2) “The temperature at which a dissociation pressure is 1 atm CO2 is MgCO3 540 °C; CaCO3 900 °C” [1] (The driving force is the larger lattice energy of MgO(3795) vs that of CaO(3414 kJ mol^-1) [2] because of the smaller Mg^2+ ion, but it would take a very good student to deduce this.) So MgO is formed first. [1] N. N. Greenwood, A. Earnshaw, Chemistry of the Elements 2nd ed. (1997) p 114. [2] 2013 CRC Handbook Section 12.26
that's not the right answer
