An unsaturated solution: 1) Hasn’t dissolved as much solute as is theoretically possible
2) Has dissolved exactly as much solute as is theoretically possible
3) Is unstable because it has dissolved more solute than would be expected.

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?