These are the correct answers of when im givin the name of the compounds. What I

Question

These are the correct answers of when im givin the name of the compounds. What I dont understand is why are some of the molecular compounds such as f not named hydrogen trioxide because its a molecular compound being consisted of all nonmetals. Also how is b cobalt (ii)oxalate and how are they getting the two. I already understand about the numerals for transition metals but im not understanding were they pull the two from. Also how do you know when to put ite or ate at the end of ionic compounds. Please give a brief explanation or overview. Im begging, ive been trying to figure this out by myself for days.

a. Combining the cation and anion names and eliminating the word ion from each of the individual ions’ names, we get potassium phosphate as the name of K3PO4.

b. CoC2O4 is cobalt(II) oxalate.
c. Li2CO3 is lithium carbonate.
d. K2Cr2O7 is potassium dichromate.

e. NH4NO2 is ammonium nitrite.

f. HIO3 is hydrogen iodate.
g. SrSO4 is strontium sulfate.
h. Al(OH)3 is aluminum hydroxide.

Explanation / Answer

The oxalate ion has a charge of -2 on its structure (C2O4(2-)) hence in order for the compound to be chargelessm the cobalt must be present in +2 oxidation state, hence the two represents the oxidation state of cobalt in the above name

The ite and ate prefixes also depends on the oxidation state of the atom, NO2(-) nitrite ion and NO3(-) nitrate ion, the compound with higher oxidation state gets an -ate prefix

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