Question: Calcium hydroxide has a neutralizing value (calcium carbonate equivalent) of __________.
Options:
179%
136%
109%
100%
✅Explanation:
The neutralizing value or calcium carbonate equivalent (CCE) is a measure of a material's ability to neutralize acidity, compared to pure calcium carbonate (CaCO3), which has a CCE of 100%. Calcium hydroxide (Ca(OH)₂) has a higher CCE than calcium carbonate because it has two hydroxide ions (OH⁻) per molecule, which can neutralize more acid than the single carbonate ion (CO₃²⁻) in calcium carbonate. The CCE of calcium hydroxide is approximately 136%.
The neutralizing value or calcium carbonate equivalent (CCE) is a measure of a material's ability to neutralize acidity, compared to pure calcium carbonate (CaCO3), which has a CCE of 100%. Calcium hydroxide (Ca(OH)₂) has a higher CCE than calcium carbonate because it has two hydroxide ions (OH⁻) per molecule, which can neutralize more acid than the single carbonate ion (CO₃²⁻) in calcium carbonate. The CCE of calcium hydroxide is approximately 136%.
• Here are some other neutralizing values for different liming materials:
-Calcium carbonate: 100%
-Calcium-magnesium carbonate: 109%
-Calcium oxide: 179%
-Magnesium carbonate: 119%
-Magnesium hydroxide: 172%