Calcium Oxide Solubility Guide Water Solubility & Industrial Uses

• Introduction to Calcium Oxide Solubility Dynamics
• Factors Influencing Solubility in Aqueous Solutions
• Technical Advantages of High-Purity Calcium Oxide
• Comparative Analysis of Industrial-Grade Suppliers
• Customized Solubility Optimization Strategies
• Real-World Applications in Chemical Manufacturing
• Future Perspectives on Calcium Oxide Utilization

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Calcium Oxide Solubility Dynamics in Modern Industry

Calcium oxide (CaO) demonstrates a solubility of 1.19 g/100 mL in water at 25°C, with significant exothermic reactivity. This fundamental property drives its industrial value across pH modification processes and metallurgical applications. The compound's limited aqueous dissolution capacity (6.95 g/L at 20°C) necessitates precise handling protocols to maximize operational efficiency.

Critical Determinants in Aqueous Dissolution

Temperature elevation to 100°C increases CaO solubility by 400% through enhanced ionic dissociation. Particle size reduction below 50 µm accelerates hydration kinetics, achieving 92% reaction completion within 15 minutes. Pressure variations above 3 atm demonstrate measurable impacts on dissolution rates, particularly in closed-system reactors.

Performance Advantages of Refined Calcium Oxide

High-purity CaO (≥98.5%) reduces residual impurities by 67% compared to standard grades. Advanced calcination techniques yield surface areas exceeding 25 m²/g, enhancing reactivity in flue gas desulfurization systems. These premium variants deliver 40% faster neutralization rates in wastewater treatment applications.

Industrial Supplier Benchmarking

Tailored Solubility Solutions

Custom surface-modified CaO achieves pH stabilization within ±0.3 units in pharmaceutical synthesis. Nano-encapsulated formulations extend controlled release durations to 8 hours in agricultural applications. Proprietary additive packages reduce hydroxide precipitation by 81% in continuous process streams.

Industry-Specific Implementation Cases

Innovative Calcium Oxide Solubility Applications

Emerging membrane technologies now enable 95% CaO recovery from saturated solutions. Advanced simulation models predict solubility behavior within 2% accuracy across temperature gradients. These developments position calcium oxide solubility
optimization as critical for sustainable industrial practices, particularly in carbon capture systems requiring precise alkaline balance.

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FAQS on calcium oxide solubility

Q: What is the solubility of calcium oxide in water?

A: Calcium oxide (CaO) reacts exothermically with water to form calcium hydroxide (Ca(OH)₂). It is not truly "soluble" but undergoes a chemical reaction, producing a sparingly soluble solution of Ca(OH)₂.

Q: How does calcium oxide behave when mixed with water?

A: When calcium oxide is mixed with water, it forms calcium hydroxide through a vigorous reaction. The resulting solution has limited solubility, creating a saturated, alkaline slurry.

Q: Is calcium hydroxide more soluble than calcium oxide?

A: Calcium hydroxide (Ca(OH)₂) has very low solubility in water (~0.16 g/100 mL at 20°C), while calcium oxide itself does not dissolve—it reacts entirely to form Ca(OH)₂.

Q: Why is calcium oxide considered insoluble in water?

A: Calcium oxide does not dissolve in water; instead, it chemically reacts to produce calcium hydroxide. This reaction consumes CaO, making its direct solubility negligible.

Q: Does temperature affect calcium oxide’s solubility in water?

A: Temperature influences the solubility of the resulting calcium hydroxide. Higher temperatures reduce Ca(OH)₂ solubility, whereas the initial CaO reaction remains highly exothermic regardless.