Chemical Compounds and Ions

The video tutorial explains how to write the chemical formula for Tin(II) Phosphate. It begins by identifying the elements involved: Tin (Sn) and the polyatomic ion Phosphate (PO4). The tutorial describes the charges of these ions and demonstrates how to balance them using the crisscross method. The final formula, Sn3(PO4)2, is verified by ensuring the net charge is zero. The tutorial concludes with a summary of the process.

What is the element symbol for tin as found on the periodic table?

• Pb

• Te

• Sn

• Ti

What is the charge of the phosphate ion?

• 2+

• 3+

• 3-

• 2-

Which method is used to balance the charges in an ionic compound?

• Cross-multiply method

• Crisscross method

• Substitution method

• Addition method

Why do we need to use parentheses around the phosphate in the formula?

• To separate it from tin

• To show the charge of phosphate

• To highlight it as a polyatomic ion

• To indicate multiple phosphate ions

What is the final chemical formula for tin(II) phosphate?

• Sn2(PO4)3

• Sn(PO4)2

• Sn3(PO4)2

• Sn(PO4)3

How do we verify that the charges in the formula are balanced?

• By ensuring the charges are equal

• By checking the net charge is zero

• By counting the number of atoms

• By comparing with a reference table

What is the net charge of the compound tin(II) phosphate?

• +2

• -1

• 0

• +1

Who is the presenter of the video?

• Dr. C

• Dr. D

• Dr. B

• Dr. A