Nickel Compounds and Phosphate Ions

The video tutorial explains how to write the formula for Nickel(II) Phosphate. It begins by identifying Nickel's 2+ ionic charge using the periodic table and Roman numerals. The tutorial then discusses the phosphate ion, which is a polyatomic ion with a 3- charge. To balance the charges and achieve a neutral compound, the crisscross method is used, resulting in the formula Ni3(PO4)2. The video concludes by verifying the formula's correctness through charge calculations.

What is the symbol for nickel on the periodic table?

• Ni

• Ne

• Nk

• Nl

What charge does the Roman numeral II indicate for nickel?

• 4+

• 3+

• 2+

• 1+

What is the charge of the phosphate ion?

• 2-

• 1-

• 3-

• 4-

Why is it important for the charges in a compound to add up to zero?

• To make the compound stable

• To make the compound colorful

• To make the compound magnetic

• To make the compound visible

What method is used to balance the charges in Nickel 2 Phosphate?

• Crisscross method

• Subtraction method

• Cross-multiplication method

• Addition method

How many phosphate ions are needed in the formula for Nickel 2 Phosphate?

• One

• Four

• Two

• Three

What is the final formula for Nickel 2 Phosphate?

• Ni2(PO4)3

• Ni2P3

• Ni3P2

• Ni3(PO4)2

What is the net charge of the Nickel 2 Phosphate compound?

• 3+

• 0

• 2-

• 1+