Question

What is the correct name of the compound with the formula \[N{H_4}N{O_2}\]\[?\]

Answer 1

Hint: If an ionic compound's formula is not known, we must first find it. To find an ionic compound's formula, first define the cation and record its symbol and charge. Then, write down the anion's symbol and feed it on a piece of paper. Finally, combine the two ions to create a chemical compound that is electrically neutral.

Complete answer:
\[N{H_4}^ + \] has a + charge because it is \[N{H_3}\]that has formed a bond with a \[{H^ + }\] using the N lone pair. The whole ion has one more proton than it has electrons hence the charge.
Ammonium nitrite is the molecular name of \[N{H_4}N{O_2}\].
Since nitrogen in an acid form has two oxidation numbers, the higher (\[ + 5\]) is reserved for "nitrate" (like in nitric acid) and the lower (\[ + 3\]) get the name "nitrite" (nitrous acid).
The nitrogen in the ammonium-ion plays a completely different role.
When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound.” \[mono - \]” indicates one, “\[di - \]” indicates two, “\[tri - \]” is three, “\[tetra - \]” is four, “\[penta - \]” is five, and “\[hexa - \]” is six, “\[hepta - \]” is seven, “\[octo - \]” is eight, “\[nona - \]” is nine, and “\[deca - \]” is ten. . Example the chemical name for common table salt is sodium chloride. The periodic table shows that the symbol for sodium is \[Na\] and the symbol for chlorine is \[Cl\]. The chemical formula for sodium chloride is \[NaCl\].
 Hence, ammonium nitrite (\[N{H_4}N{O_2}\]) is the ammonium salt of nitrous acid.

Note:
Note that when writing formula, the positive atom or ion comes first followed by the name of the negative ion. \[N{H_4}N{O_2}\] is a nitrate salt of the ammonium cation. Since ammonium is a cation and bonds with the anion nitrate, hence the compound is bonded by an ionic bond. Nitrate is a polyatomic ion with the chemical formula NO − 3. Salts containing this ion are called nitrates.