Calcium and Silicate Compounds

The video tutorial explains how to write the formula for calcium silicate. It begins by identifying calcium and the silicate ion, which is a polyatomic ion with a 4- charge. The tutorial discusses the need to balance the charges between calcium (2+) and silicate (4-) ions, resulting in the formula for calcium silicate. It also mentions alternative ways to write the formula and emphasizes the most common representation used in educational contexts.

What is the chemical symbol for calcium?

• Ca

• Cl

• C

• Cu

Which of the following best describes a polyatomic ion?

• An ion found on the periodic table

• An ion with no charge

• An ion with a single atom

• An ion with multiple atoms

What is the charge of the silicate ion (SiO4)?

• 4-

• 1-

• 2-

• 3-

Why do we need two calcium ions to balance the charge of one silicate ion?

• Because silicate has a 1- charge

• Because calcium has a 2+ charge

• Because calcium has a 1+ charge

• Because silicate has a 2- charge

What type of compound is formed between calcium and silicate?

• Molecular compound

• Covalent compound

• Ionic compound

• Metallic compound

Which group on the periodic table does calcium belong to?

• Group 2

• Group 1

• Group 3

• Group 4

In a school context, how is the formula for calcium silicate most commonly written?

• Ca2SiO3

• CaSiO4

• Ca2SiO4

• CaSiO3