Sodium Compounds and Polyatomic Ions

The video tutorial explains how to write the formula for sodium bisulfite. It begins by identifying sodium as 'Na' and introduces bisulfite as a polyatomic ion, HSO3, with a charge of one minus. The tutorial discusses the ionic nature of the compound, emphasizing the need to balance charges. Sodium, being in group one, has a charge of one plus, which balances with the bisulfite ion's one minus charge, resulting in a neutral compound. The final formula for sodium bisulfite is NaHSO3.

What is the element symbol for sodium?

• Si

• Sb

• S

• Na

Which of the following is a polyatomic ion?

• Na

• Cl

• HSO3

• O2

What is the charge of the sodium ion in sodium bisulfite?

• 1+

• 2+

• 1-

• 2-

What is the charge of the bisulfite ion?

• 1+

• 2+

• 1-

• 2-

Why must the charges in sodium bisulfite add up to zero?

• To balance the equation

• To ensure it is a neutral compound

• To make it a polyatomic ion

• To make it a metal

What is the chemical formula for sodium bisulfite?

• Na2SO4

• Na2O

• NaCl

• NaHSO3