Lead(IV) Phosphate and Ionic Compounds

The video tutorial explains how to write the chemical formula for lead(IV) phosphate. It begins by identifying lead and phosphate, noting that phosphate is a polyatomic ion. The tutorial discusses the ionic charges of lead and phosphate, emphasizing the need for a neutral compound. The crisscross method is used to derive the formula, and the importance of parentheses around polyatomic ions is highlighted. Finally, the formula is verified to ensure it is correct.

What is the chemical symbol for lead?

• Pt

• Pd

• Po

• Pb

Which of the following is a polyatomic ion?

• Lead

• Hydrogen

• Phosphate

• Oxygen

What is the charge of the phosphate ion?

• 4-

• 4+

• 3-

• 3+

Why do we need to balance the charges in an ionic compound?

• To achieve a net charge of zero

• To change its color

• To increase its mass

• To make it more reactive

What method is used to balance the charges in lead(IV) phosphate?

• Substitution method

• Crisscross method

• Elimination method

• Addition method

How many phosphate ions are needed to balance the charge of three lead ions?

• Three

• Two

• Five

• Four

What is the total negative charge contributed by four phosphate ions?

• 14-

• 12-

• 10-

• 8-

How many lead ions are present in the formula for lead(IV) phosphate?

• Four

• Three

• Two

• One

What is the final formula for lead(IV) phosphate?

• Pb4(PO4)3

• Pb3(PO4)4

• Pb2(PO4)3

• Pb3(PO4)2

Who is the presenter of the video?

• Dr. C

• Dr. B

• Dr. D

• Dr. A