MnO₄- chemical name for ALEKS

The correct answer is Option C.

Explanation:

We are given some polyatomic ions with their oxidation states. Polyatomic ions are defined as the ions which are formed from more than 2 atoms.

We need to find out the chemical formula for ammonium phosphate.

For this, the polyatomic ions used are:

Ammonium ion - [tex]NH_4^+[/tex]

Phosphate ion - [tex]PO_4^{3-}[/tex]

By using criss-cross method, the oxidation state of the ions are exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

Thus, the chemical formula for this compound is [tex](NH_4)_3PO_4[/tex]

Hence, the correct answer is Option C.

- Titanium(III)oxide

Explanations:- Titanium is a transition metal and we know that transition metals shows variable oxidation states. Charge for oxygen is -2. While writing the chemical formulas, we use criss cross means the charge of the anion becomes the subscript of the cation. Similarly, the charge of the cation becomes the subscript of the anion.

Here, it is important that we use the simple ratio of the charges for their subscripts. For example if the anion and cation has equal charges then no subscripts are used.

The given chemical formula is [tex]Ti_2O_3[/tex] . From this formula, the subscript of Ti is 2 which is the charge of oxygen atom. Similarly the subscript of O is 3 which is the charge of titanium atom.

While writing names for the compounds containing transition metals then the charge of the transition metal is indicated by writing roman numeral next to the name of the metal.

When oxygen is bonded to the metal ions then these compounds are named as oxides. As the charge of Ti is +3, the name of the compound [tex]Ti_2O_3[/tex] is Titanium(III)oxide.

The correct answer is option C.

Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first.

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide', 'ate' , 'ite' according to polyatomic anion.

The chemical formula for the compound ammonium phosphate:

Name of the cation =  ammonium = [tex]NH_4^{+}[/tex]

Name of the anion =  phosphate  = [tex]PO_4^{3-}[/tex]

By criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions. This results in the formation of a neutral compound.

So, the chemical formula for the given compound is

Ammonium phosphate = [tex](NH_4)_3PO_4[/tex]

Mno4- chemical name is permanganate