Phosphite Ion and Potassium Chemistry

The video tutorial explains how to write the chemical formula for potassium phosphite. It begins by identifying the element symbols for potassium and phosphite, noting that phosphite is a polyatomic ion with a three-minus charge. The tutorial introduces the crisscross method to balance the charges, resulting in the formula K3PO3. The video concludes by verifying the formula and ensuring the charges add up to zero.

What is the chemical symbol for potassium?

• K

• Pt

• Po

• P

What does the 'ite' suffix in phosphite indicate?

• It is a metal

• It has a positive charge

• It is a monatomic ion

• It is a polyatomic ion

What is the chemical formula for the phosphite ion?

• PO4

• P3O4

• PO3

• P2O5

What is the ionic charge of the phosphite ion?

• 1-

• 3+

• 2-

• 3-

What method is used to balance the charges in the formula for potassium phosphite?

• Addition method

• Substitution method

• Crisscross method

• Cross-multiplication method

How many potassium atoms are needed to balance the charge of one phosphite ion?

• 1

• 2

• 3

• 4

What is the final chemical formula for potassium phosphite?

• K3PO3

• K2PO3

• KPO3

• K4PO3