The video tutorial explains how to write the formula for barium phosphate. It begins by identifying barium on the periodic table and recognizing phosphate as a polyatomic ion. The tutorial discusses the ionic charges of barium and phosphate, emphasizing the need for a net charge of zero. The crisscross method is introduced to balance these charges, and the correct formula is verified. The video concludes with a summary of the process and the final formula for barium phosphate.

What is the symbol for barium on the periodic table?

• Ba

• B

• Br

• Be

Phosphate is classified as which type of ion?

• Monatomic ion

• Anion

• Polyatomic ion

• Cation

What is the ionic charge of barium?

• 3+

• 2+

• 4+

• 1+

What is the charge of the phosphate ion?

• 4-

• 2-

• 1-

• 3-

Why do the charges of barium and phosphate need to add up to zero?

• To make the compound colorful

• To increase the compound's reactivity

• To make the compound soluble

• To form a stable compound

What method is used to balance the charges in barium phosphate?

• Cross-multiplication

• Crisscross method

• Substitution method

• Elimination method

How many phosphate ions are needed in the formula for barium phosphate?

• 1

• 4

• 3

• 2

What is the total positive charge contributed by barium ions in the formula?

• 6+

• 4+

• 2+

• 8+

What is the net charge of the barium phosphate compound?

• 1+

• 0

• 2-

• 3+

What is the final chemical formula for barium phosphate?

• BaPO4

• Ba(PO4)2

• Ba2(PO4)3

• Ba3(PO4)2