Understanding Ionic Compounds and Hydroxide

The video explains how to write the Lewis structure for calcium hydroxide (CaOH2). It describes calcium as a metal and hydroxide as a polyatomic ion, forming an ionic compound. The video details the transfer of valence electrons from calcium to hydroxide, balancing charges to form a neutral compound. It illustrates the Lewis structure, showing electron loss and ionic bond formation, and concludes with the concept of formula units in a crystal structure.

What type of ion is hydroxide considered as?

• Monatomic ion

• Polyatomic ion

• Cation

• Anion

What is the role of calcium in the formation of calcium hydroxide?

• It gains electrons from hydroxide.

• It shares electrons with hydroxide.

• It transfers valence electrons to hydroxide.

• It forms a covalent bond with hydroxide.

What is the charge of a calcium ion in calcium hydroxide?

• 1+

• 2+

• 1-

• 2-

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

• One

• Two

• Three

• Four

What is the overall charge of calcium hydroxide as a compound?

• Neutral

• Negative

• Positive

• Variable

What happens to the electrons during the formation of calcium hydroxide?

• They are transferred from calcium to hydroxide.

• They are shared equally between calcium and hydroxide.

• They remain with calcium.

• They are transferred from hydroxide to calcium.

What is the significance of brackets in the Lewis structure of hydroxide?

• They highlight the ionic bond.

• They denote the negative charge of the ion.

• They show the presence of a covalent bond.

• They indicate a positive charge.

Which of the following best describes the bond in calcium hydroxide?

• Covalent bond

• Ionic bond

• Metallic bond

• Hydrogen bond

What is a formula unit in the context of ionic compounds?

• A single molecule of the compound.

• A repeating unit in a crystal lattice.

• An isolated ion.

• A covalent bond representation.

How does the concept of a formula unit help in understanding ionic compounds?

• It highlights covalent bonding.

• It illustrates electron sharing.

• It shows the molecular structure.

• It demonstrates the repeating pattern in crystals.