Calcium Sulfate Solubility and Properties

The video explores whether calcium sulfate (CaSO4) is an electrolyte. It begins by defining electrolytes as substances that dissolve in water to produce ions, which conduct electricity. Calcium sulfate is identified as an ionic compound composed of calcium and sulfate ions. The video examines its solubility, noting that while sulfates are generally soluble, calcium sulfate is only slightly soluble. This limited solubility means it produces few ions, classifying it as a weak electrolyte. The video concludes by confirming that CaSO4 is a weak electrolyte.

What is the primary focus of the video?

• The chemical properties of water

• The nature of calcium sulfate as an electrolyte

• The electrical conductivity of metals

• The solubility of all sulfates

What type of compound is calcium sulfate?

• Organic compound

• Metallic compound

• Ionic compound

• Covalent compound

What is the general solubility trend for sulfates?

• All sulfates are insoluble

• All sulfates are highly soluble

• Sulfates do not dissolve in water

• Sulfates are generally soluble with some exceptions

What does 'SS' indicate about calcium sulfate's solubility?

• Slightly soluble

• Completely insoluble

• Highly soluble

• Insoluble

What ions are produced when calcium sulfate dissolves in water?

• Ca2+ and SO4 2-

• Ca+ and SO4-

• Ca2+ and SO3 2-

• Ca+ and SO3-

Why is calcium sulfate considered a weak electrolyte?

• It is a covalent compound

• It is only slightly soluble, producing few ions

• It produces a large number of ions

• It does not dissolve in water

What is the charge on the calcium ion in calcium sulfate?

• 1-

• 2+

• 1+

• 2-

What is the charge on the sulfate ion in calcium sulfate?

• 2-

• 1-

• 2+

• 1+