Ionic Charges and Nitrate Ions

The video tutorial explains how to name the compound CrNO3. It begins by identifying NO3 as the nitrate ion, a polyatomic ion, and recognizing chromium as a transition metal. The tutorial details the process of naming the metal first, followed by the polyatomic ion, resulting in 'chromium nitrate.' Since chromium is a transition metal, it can have different ionic charges. The video explains how to determine the charge of chromium by considering the charge of the nitrate ion, leading to the final name 'chromium III nitrate,' with the Roman numeral indicating the 3+ charge of chromium.

What is the polyatomic ion present in Cr(NO3)3?

• Sulfate

• Nitrate

• Phosphate

• Carbonate

What type of metal is chromium in the context of Cr(NO3)3?

• Noble gas

• Transition metal

• Alkaline earth metal

• Alkali metal

How many nitrate ions are bonded to chromium in Cr(NO3)3?

• One

• Two

• Four

• Three

What is the charge of a single nitrate ion?

• 1+

• 2+

• 1-

• 2-

What is the total negative charge contributed by the nitrate ions in Cr(NO3)3?

• 1-

• 2-

• 3-

• 4-

What is the ionic charge of chromium in Cr(NO3)3?

• 4+

• 3+

• 2+

• 1+

How is the charge of chromium indicated in the name of Cr(NO3)3?

• By a prefix

• By a suffix

• By Roman numerals

• By a subscript