Nickel(II) Phosphate and Ionic Compounds

The video tutorial explains how to write the formula for nickel(II) phosphate. It begins by identifying nickel and phosphate ions, noting that phosphate is a polyatomic ion. The tutorial discusses the ionic charges of nickel (2+) and phosphate (3-) and demonstrates how to use the crisscross method to balance these charges, resulting in the formula Ni3(PO4)2. The video concludes by verifying the formula to ensure the net charge is zero.

What is the element symbol for nickel?

• Ne

• Nk

• N

• Ni

Which of the following is a polyatomic ion?

• Sodium

• Phosphate

• Chlorine

• Nickel

What is the ionic charge of nickel in nickel(II) phosphate?

• 4+

• 3+

• 2+

• 1+

What is the charge of the phosphate ion?

• 1-

• 2-

• 3-

• 4-

What method is used to balance the charges in ionic compounds?

• Addition method

• Substitution method

• Cross-multiply method

• Crisscross method

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

• Four

• One

• Two

• Three

What is the net charge of a correctly balanced nickel(II) phosphate formula?

• 1+

• 0

• 2-

• 3+

How many nickel ions are present in the formula Ni3(PO4)2?

• One

• Two

• Three

• Four

What is the correct chemical formula for nickel(II) phosphate?

• Ni(PO4)2

• Ni2(PO4)

• Ni3(PO4)2

• Ni2(PO4)3

Who is the presenter of the tutorial?

• Dr. A

• Dr. B

• Dr. C

• Dr. D