Calcium Hydroxide and Hydroxide Ions

The video tutorial explains how to name the compound Ca(OH)2, known as calcium hydroxide. It begins by identifying calcium as a metal and the hydroxide ion as a polyatomic ion. The tutorial then describes the process of naming the metal as it appears on the periodic table and recognizing the hydroxide ion. Finally, it explains how to write the formula for calcium hydroxide by balancing the ionic charges of calcium and hydroxide ions.

What is the metal present in Ca(OH)2?

• Magnesium

• Potassium

• Calcium

• Sodium

What type of ion is hydroxide?

• Monatomic ion

• Anion

• Polyatomic ion

• Cation

How do you name the metal in an ionic compound?

• By its atomic number

• By its charge

• By its chemical symbol

• As it appears on the periodic table

Which ion is frequently encountered in chemistry and is part of Ca(OH)2?

• Carbonate

• Sulfate

• Nitrate

• Hydroxide

What is the name of the compound Ca(OH)2?

• Calcium Hydroxide

• Calcium Oxide

• Calcium Sulfate

• Calcium Carbonate

What is the charge of the calcium ion in Ca(OH)2?

• 1+

• 2+

• 1-

• 2-

How many hydroxide ions are needed to balance the charge of one calcium ion in Ca(OH)2?

• One

• Two

• Three

• Four