Calcium Carbonate Solubility Concepts

The video discusses the solubility of calcium carbonate (CaCO3) in water, explaining that it is generally insoluble. It covers two methods to determine this: memorizing solubility rules and using solubility tables. The video also mentions exceptions for carbonates, such as those involving group one elements and ammonium. Additionally, it explains how to experimentally test solubility and discusses the solubility product (Ksp) of calcium carbonate, which is very low, indicating minimal solubility. The video concludes by reinforcing the concept that calcium carbonate is considered insoluble in water.

What is the general solubility of calcium carbonate in water?

• Highly soluble

• Partially soluble

• Insoluble

• Soluble

Which group of elements forms soluble carbonates?

• Transition metals

• Group 1 elements

• Noble gases

• Group 2 elements

What is an exception to the insolubility of carbonates?

• Copper carbonate

• Ammonium carbonate

• Iron carbonate

• Calcium carbonate

How can a solubility table help in determining the solubility of a compound?

• By indicating the density

• By providing the melting point

• By listing the solubility of compounds

• By showing the boiling point

What happens to calcium carbonate when placed in water according to the solubility table?

• It dissolves completely

• It remains as a solid

• It changes color

• It forms a gas

What is a simple method to test the solubility of calcium carbonate?

• Heating it

• Placing it in water

• Mixing with oil

• Exposing to sunlight

What does the solubility product (Ksp) indicate?

• The extent of solubility of a compound

• The boiling point of a compound

• The melting point of a compound

• The density of a compound

What is the Ksp value for calcium carbonate?

• 1.0 times 10 to the minus third

• 5.0 times 10 to the minus fifth

• 2.2 times 10 to the minus seventh

• 3.3 times 10 to the minus ninth

Why is calcium carbonate considered insoluble despite having a Ksp value?

• Because the dissolved amount is negligible

• Because it changes color

• Because it dissolves completely

• Because it forms a gas

What is the significance of a small Ksp value?

• Indicates low solubility

• Indicates high melting point

• Indicates high density

• Indicates high solubility