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LIME. Tuba Naz BOZKURT 213 9/A. C alcium oxide (quicklime ) C alcium hydroxide (slaked lime ). Quicklime. It is a white, caustic, alkaline crystalline solid at room temperature . It releases heat when dissolved in water . It’s a base . Its chemical formula is CaO .
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LIME Tuba Naz BOZKURT 213 9/A
Calcium oxide (quicklime) • Calcium hydroxide (slaked lime)
Quicklime • It is a white, caustic, alkalinecrystalline solid at room temperature. • It releases heat when dissolved in water. • It’s a base. • Its chemical formula is CaO.
Melting point :2572 °C • Boiling point :2850 °C • Solubilityin acids :soluble • Solubilityin methanol :insoluble • Acidity :12.8
SlakedLime • It is a colorless crystal or white powder. • It is of low toxicity • Calcium hydroxide is used in many applications, including food preparation.
Meltingpoint: 580 °C • Solubility in water :0.189 g/100 mL (0 °C) • Solubility :Solublein glycerolandacids.Insoluble in alcohol. • Acidity:12.4 • Basicity:(pKb)2.37
Heat of Solution of Calcium Hydroxide • Aim: Determine the molar enthalpy of solution of calciumhydroxide.
Approach: • Determine the molar enthalpy of neutralization using the Heat of Neutralization experiment. • Using calorimetry, determine the molar enthalpy of solution by dissolving calcium hydroxide in an aqueous HCl solution and accounting for the heat of neutralization in the calculations.