Fill in the blank: The oxidation variety of nitrogen is zero in nitrogen molecules and also ＿ in nitric acid.

You are watching: The oxidation number of nitrogen in hno3 is:

### Video Transcript

to fill in the blank. The oxidation number of nitrogen is zero in nitrogen molecules and also blank in nitric acid. (A) plus six, (B) plus five, (C) to add three, (D) minus five, (E) minus six.

This difficulty is asking us to find the oxidation variety of nitrogen in nitric acid. In bespeak to fix this problem, permit us very first discuss oxidation numbers. Oxidation numbers show the level of oxidation of an atom in isolation or in a compound in terms of counting electrons. Oxidation numbers tell us how numerous electrons an element will obtain or lose to type a shortcut or an ion.

due to the fact that we need to know the oxidation number of nitrogen in nitric acid, let united state write the formula because that nitric acid. Nitric acid is written of the hydrogen ion, which has a charge of one plus, and also the nitrate ion, NO3, through a charge of one minus. We will crisscross the fee numbers and drop the confident and an unfavorable signs the the ions. This offers us the formula of HNO3 because that nitric acid.

This inquiry reminds us that nitrogen has an oxidation number of zero in nitrogen molecules. This is since the nitrogen molecule is specifically composed of only one type of element, nitrogen. Yet we need to uncover the oxidation number of nitrogen in HNO3, which walk not have actually an oxidation number of zero since the nitrogen atom is within a compound created of much more than only one form of element. As soon as determining the oxidation variety of an atom in a molecule, the molecule will always have a net fee of zero.

Now, permit us discuss some the the rules for determining the oxidation number of elements within a compound that will assist us come answer this question. The an initial rule us will talk about is the oxidation number because that hydrogen in a compound is plus one. Therefore, the oxidation number of hydrogen in nitric acid is add to one. The other rule that will help us is the oxidation number because that oxygen in a link is minus two. So, due to the fact that there space three atoms of oxygen in nitric acid and each oxygen atom has actually an oxidation number of minus two, the all at once oxidation number is minus six for oxygen.