Chromium and Phosphate Ions

This video tutorial explains how to write the chemical formula for chromium(III) phosphate. It begins by identifying the element symbol for chromium and its charge, followed by the phosphate ion and its charge. The tutorial emphasizes the importance of balancing these charges to form a neutral compound, resulting in the formula CrPO4.

What is the element symbol for chromium?

• Co

• Cm

• Ch

• Cr

What charge does the Roman numeral III indicate for chromium?

• 4+

• 3+

• 2+

• 1+

Which of the following is the correct formula for the phosphate ion?

• PO4

• PO5

• PO3

• PO2

What is the charge on the phosphate ion?

• 4-

• 3-

• 2-

• 1-

What is the correct formula for chromium phosphate?

• Cr3(PO4)2

• CrPO3

• CrPO4

• Cr2(PO4)3