Phosphate Ion and Mercury Compounds

The video tutorial explains how to write the chemical formula for mercury(II) phosphate. It begins by identifying mercury as a transition metal with a 2+ charge and phosphate as a polyatomic ion with a 3- charge. The tutorial demonstrates using the crisscross method to balance these charges, resulting in the formula Hg3(PO4)2. The video concludes by verifying the formula through charge calculations to ensure a net charge of zero.

What does the Roman numeral II indicate in mercury(II) phosphate?

• The atomic number of mercury

• The charge of the mercury ion

• The number of mercury atoms

• The number of phosphate ions

Which of the following is true about the phosphate ion?

• It is a transition metal

• It is a polyatomic ion

• It has a 2- charge

• It is found on the periodic table

What is the charge of a single phosphate ion?

• 3-

• 2+

• 2-

• 3+

Why must the charges in mercury(II) phosphate add up to zero?

• To balance the number of atoms

• To ensure it is a neutral compound

• To match the atomic number

• To make it a polyatomic ion

What is the purpose of the crisscross method?

• To find the atomic mass

• To balance chemical equations

• To simplify the balancing of ionic charges

• To determine the number of atoms

How many phosphate ions are needed to balance the charge with three mercury ions?

• Three

• Two

• Four

• One

What is the chemical formula for mercury(II) phosphate?

• Hg(PO4)2

• Hg3(PO4)2

• Hg3(PO4)3

• Hg2(PO4)3

What is the net charge of mercury(II) phosphate?

• 1+

• 0

• 2+

• 3-

Which method is used to verify the chemical formula of mercury(II) phosphate?

• Substitution method

• Crisscross method

• Balancing method

• Addition method