The video tutorial explains the charge on the nitrate ion (NO3-) and how to determine it. It covers two main methods: memorization and analyzing what the nitrate ion is bonded to, such as in sodium nitrate (NaNO3) and calcium nitrate. The video also discusses using formal charge and Lewis structures to understand the nitrate ion's charge, highlighting the role of resonance in the structure. The tutorial concludes with a summary of the nitrate ion's consistent one-minus charge.

What is the ionic charge of the nitrate ion?

• 1-

• 2+

• 2-

• 1+

Which of the following is a recommended way to remember the charge of the nitrate ion?

• Memorize that it is NO3 1-

• Memorize that it is NO3 2+

• Memorize that it is NO3 1+

• Memorize that it is NO3 2-

How does the charge of sodium in sodium nitrate help determine the charge of the nitrate ion?

• Sodium has a 2- charge, so nitrate must be 2+

• Sodium has a 1- charge, so nitrate must be 1+

• Sodium has a 1+ charge, so nitrate must be 1-

• Sodium has a 2+ charge, so nitrate must be 2-

In calcium nitrate, what is the charge of the nitrate ion if calcium is in group two?

• Nitrate is 2+ to balance calcium's 2+

• Nitrate is 1- to balance calcium's 2+

• Nitrate is 2- to balance calcium's 2+

• Nitrate is 1+ to balance calcium's 2+

What is the formal charge on the nitrogen atom in the nitrate ion?

• 0

• 1+

• 2+

• 1-

What is the formal charge on each single-bonded oxygen in the nitrate ion?

• 0

• 1-

• 1+

• 2-

How do the formal charges add up to give the nitrate ion its overall charge?

• Three positive ones

• Three negative ones

• Two positive ones and one negative one

• Two negative ones and one positive one

What is the effect of resonance on the nitrate ion's structure?

• It changes the overall charge

• It averages the bond lengths

• It makes the ion unstable

• It removes the charge

Despite resonance, what remains constant in the nitrate ion?

• The number of bonds

• The overall ionic charge

• The position of nitrogen

• The number of electrons

What is the overall ionic charge of the nitrate ion after considering resonance?

• 1+

• 1-

• 2+

• 2-