Chromium 2 Phosphate Concepts

The video tutorial explains how to write the formula for chromium(II) phosphate. It begins by identifying chromium as a transition metal with a 2+ charge and phosphate as a polyatomic ion with a 3- charge. The tutorial demonstrates the crisscross method to balance these charges, resulting in the formula Cr3(PO4)2. The video concludes by verifying the formula to ensure a net charge of zero.

What is the element symbol for Chromium?

• CM

• CH

• CO

• CR

What is the charge of the Chromium ion in Chromium 2 Phosphate?

• 3+

• 4+

• 2+

• 1+

What type of ion is phosphate?

• Cation

• Monatomic ion

• Polyatomic ion

• Anion

What is the charge of the phosphate ion?

• 3-

• 2-

• 4-

• 1-

What method is used to balance the charges in Chromium 2 Phosphate?

• Addition method

• Cross-multiply method

• Substitution method

• Crisscross method

How many phosphate ions are needed to balance the charge with three Chromium ions?

• Four

• One

• Two

• Three

What is the final formula for Chromium 2 Phosphate?

• Cr(PO4)2

• Cr3(PO4)2

• Cr2(PO4)3

• Cr3(PO4)3

What is the net charge of the compound Chromium 2 Phosphate?

• 1+

• 2+

• 3+

• 0