Strontium Carbonate and Ion Charges

The video explores the reaction of strontium carbonate (SrCO3) with water (H2O). It begins by introducing the compounds and discussing their ionic nature. The solubility rules are examined, revealing that most carbonates are insoluble, including strontium carbonate, which is a group two element. Although strontium carbonate is largely insoluble, a small amount dissolves in water, dissociating into strontium ions (Sr2+) and carbonate ions (CO3 2-). The video explains how to represent this dissolution in a chemical equation, noting that the water can be shown above the reaction arrow. The video concludes by emphasizing that the dissolved amount is minimal.

What type of compound is strontium carbonate?

• Molecular compound

• Metallic compound

• Ionic compound

• Covalent compound

Which group of elements generally forms soluble carbonates?

• Transition metals

• Noble gases

• Group 2 elements

• Group 1 elements

Which of the following is NOT an exception to the insolubility of carbonates?

• Sodium carbonate

• Potassium carbonate

• Ammonium carbonate

• Strontium carbonate

What happens to strontium carbonate when it is placed in water?

• It remains mostly undissolved

• It completely dissolves

• It forms a gas

• It reacts vigorously

What is the primary reason strontium carbonate is considered insoluble in water?

• It evaporates

• It reacts with water

• It forms a precipitate

• It does not dissolve significantly

What ions are formed when a small amount of strontium carbonate dissolves in water?

• Magnesium ion and nitrate ion

• Calcium ion and sulfate ion

• Sodium ion and chloride ion

• Strontium ion and carbonate ion

What is the charge on the strontium ion when strontium carbonate dissolves?

• 1+

• 2+

• 1-

• 2-

What is the charge on the carbonate ion when strontium carbonate dissolves?

• 1+

• 2+

• 1-

• 2-

How is the dissolved state of ions in water represented in chemical equations?

• As aqueous

• As a gas

• As a liquid

• As a solid

Why is it unnecessary to write H2O in the chemical equation for dissolved strontium carbonate?

• Because it is a liquid

• Because it is already implied by the aqueous state

• Because it is a solid

• Because it is a gas