Potassium Compounds and Ions

The video tutorial explains how to write the formula for potassium chromate. It begins by identifying the element symbols for potassium and chromate, noting that chromate is a polyatomic ion with a 2- charge. The tutorial then discusses the need to balance the ionic charges, as potassium has a 1+ charge. By adding a subscript of two to potassium, the charges are balanced, resulting in the formula K2CrO4. The video concludes with a brief summary of the process.

What is the symbol for potassium?

• K

• Po

• P

• Pt

What is the charge of the chromate ion?

• 2-

• 1-

• 1+

• 2+

Why is it necessary to balance the charges in potassium chromate?

• To make it a covalent compound

• To ensure the compound is stable

• To achieve a net charge of zero

• To increase its solubility

What is the charge of potassium in the compound?

• 1+

• 2+

• 2-

• 1-

What is the correct formula for potassium chromate?

• KCrO4

• K2Cr2O7

• KCr2O7

• K2CrO4