Calcium Compounds and Ions

The video tutorial explains how to write the chemical formula for slaked lime, also known as calcium hydroxide. It begins by introducing the chemical name and then guides viewers through writing the formula by identifying the symbols for calcium and hydroxide. The tutorial emphasizes the importance of understanding ionic charges to balance the formula correctly. Finally, it discusses the application of slaked lime in creating lime water, which is used to test for carbon dioxide.

What is the chemical name for slaked lime?

• Calcium Carbonate

• Calcium Hydroxide

• Calcium Oxide

• Calcium Sulfate

What is the element symbol for calcium?

• Cu

• Cl

• Ca

• C

Which ion is not found on the periodic table and needs to be memorized or looked up?

• Hydroxide ion

• Chloride ion

• Sulfate ion

• Nitrate ion

What is the charge of the calcium ion?

• 2+

• 1+

• 2-

• 1-

How many hydroxide ions are needed to balance the charge of one calcium ion?

• One

• Two

• Three

• Four

What is the chemical formula for calcium hydroxide?

• CaSO4

• CaCO3

• Ca(OH)2

• CaO

What is lime water used to test for?

• Nitrogen

• Carbon Dioxide

• Hydrogen

• Oxygen