Is Calcium Sulfate (CaSO4) Soluble in Water? Understanding Its Solubility

Learn about the solubility of calcium sulfate (CaSO4) in water, including how much dissolves at room temperature and its classification as sparingly soluble.

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Calcium sulfate (CaSO4) is sparingly soluble in water. At room temperature, only 0.2 grams of CaSO4 can dissolve in 100 milliliters of water. This makes it somewhat difficult to dissolve, classifying it as only slightly soluble rather than fully soluble.

FAQs & Answers

  1. What does it mean that calcium sulfate is sparingly soluble in water? Calcium sulfate being sparingly soluble means it dissolves only a small amount in water; specifically, about 0.2 grams can dissolve in 100 milliliters of water at room temperature.
  2. How does temperature affect the solubility of CaSO4? Generally, solubility of calcium sulfate slightly increases with temperature, but it remains only sparingly soluble even at higher temperatures.
  3. What are common uses of calcium sulfate despite its low solubility? Calcium sulfate is widely used in construction (as plaster), food industry (as a coagulant), and agriculture, where its partial solubility is advantageous.

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For more insights on solubility and chemical properties of common compounds, check out our related videos on ionic compounds' solubility, water chemistry basics, and how temperature affects dissolution rates.

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