The correct names of fe3po42 and znno32 are question 32...

The correct names of Fe3(PO4)2 and Zn(NO3)2 are: 1) Iron(III)Phosphate and Zinc nitrate 2) Iron(II)Phosphate and Zinc nitrate 3) Iron(II)Phosphide and Zinc nitrogen oxide 4) Iron(III)Phosphide and Zinc nitrogen oxide

Transcript

00:02 Hi there, in this question we are asked to write the correct names for these compounds.

00:08 And we see that they are ionic compounds because they contain a metal and a polyatomic ion.

00:14 So that means a positive ion, a cation, and an anion, which is a negative ion, making these ionic compounds.

00:25 So to name an ionic compound, we do not use greek prefixes like you do with molecular compounds, like in carbon dioxide, for example.

00:35 We have that prefix of di - meaning two.

00:37 We don't use those for ionic compounds.

00:40 The way that we name ionic compounds is that we write the name for the cation, which is the positive ion, and the name of the anion.

00:49 So fe is iron and po4 is phosphate.

00:59 Since our anion is a polyatomic ion, its ending stays as is.

01:05 So this is phosphate, so we don't change its name.

01:09 All right, then we see that iron is one of those elements that does not have just a single oxidation state.

01:19 It can make ions of different charges depending upon the situation.

01:24 Therefore, we need to add a roman numeral to tell the reader the charge of the iron in this compound.

01:31 And to do that, we have to figure out its charge.

01:33 By working backwards a little bit, we know that ionic compounds are neutral.

01:39 So that means their total positive and total negative charges must add up to zero...

Question

The correct names of Fe3(PO4)2 and Zn(NO3)2 are: 1) Iron(III)Phosphate and Zinc nitrate 2) Iron(II)Phosphate and Zinc nitrate 3) Iron(II)Phosphide and Zinc nitrogen oxide 4) Iron(III)Phosphide and Zinc nitrogen oxide

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