Calcium Compounds and Ionic Charges

The video tutorial explains how to write the formula for calcium hydrogen phosphate. It begins by identifying calcium and hydrogen phosphate, a polyatomic ion with a 2- charge. The tutorial then discusses the need to balance ionic charges, noting that calcium has a 2+ charge. By ensuring the charges balance to zero, the formula for calcium hydrogen phosphate is determined to be CaHPO4.

What is the element symbol for calcium?

• Cu

• C

• Ca

• Cl

What is the chemical formula for the hydrogen phosphate ion?

• HPO3

• HPO4

• H2PO4

• H3PO4

Why is it important to balance the charges in an ionic compound?

• To decrease the compound's density

• To increase the compound's weight

• To make the compound colorful

• To ensure the compound is stable

What is the ionic charge of calcium in the periodic table?

• 4+

• 1+

• 3+

• 2+

What is the final formula for calcium hydrogen phosphate?

• CaHPO3

• CaH2PO4

• CaHPO4

• CaH3PO4