Which is the correct formula for nitrate ion?

Study for the IMAT Chemistry Exam. Access flashcards and multiple choice questions; hints and explanations included for each question. Prepare effectively for your exam.

Multiple Choice

Which is the correct formula for nitrate ion?

Explanation:
Nitrate is defined by one nitrogen atom bonded to three oxygens and a net negative charge of -1. Because of resonance, the three N–O bonds are equivalent, giving the nitrate ion the formula NO3−. This distinguishes it from other common ions: carbonate and sulfite each have three oxygens but a -2 charge, while phosphate has four oxygens and a -3 charge. So the correct formula for nitrate is NO3−.

Nitrate is defined by one nitrogen atom bonded to three oxygens and a net negative charge of -1. Because of resonance, the three N–O bonds are equivalent, giving the nitrate ion the formula NO3−. This distinguishes it from other common ions: carbonate and sulfite each have three oxygens but a -2 charge, while phosphate has four oxygens and a -3 charge. So the correct formula for nitrate is NO3−.

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