Question

Write the molecular formulae of all the compounds that can be formed by the combination of the following ions. $C{u^{2 + }},N{a^ + },C{l^ - },S{O_4}^{2 - },F{e^{3 + }}$
A. $\dfrac{{CuC{l_2}}}{{CuS{O_4}}}$
B. $\dfrac{{NaCl}}{{N{a_2}S{O_4}}}$
C. $\dfrac{{FeC{l_3}}}{{F{e_2}{{\left( {S{O_4}} \right)}_3}}}$
D.All of the above

Answer 1

To make a compound with the given ions, at first, we have to choose the ions by which the overall charge of the compound becomes zero. Electropositive elements form a positive ion and electronegative ions form a negative ion. The number of charges of the ions is equal to its valency.
Complete step by step answer:
Now the possible compounds can be formed by the given compounds, between $C{u^{2 + }}$, and $C{l^ - }$ the compound is $CuC{l_2}$. Between $C{u^{2 + }}$, and the compound is, $CuS{O_4}$. Between $N{a^ + }$, $C{l^ - }$ the compound is NaCl. Between $N{a^ + }$ and $S{O_4}^{2 - }$ the compound is $N{a_2}S{O_4}$.Between $F{e^{3 + }}$ and $C{l^ - }$ the compound is, $FeC{l_3}$. Between $F{e^{3 + }}$ and $S{O_4}^{2 - }$ the compound is $F{e_2}{\left( {S{O_4}} \right)_3}$.
So, from the given compounds all of those compounds which are mentioned in options can be formed.

So, the correct option is D.

Additional information:
The given compound is a coordination compound. To find the IUPAC name for the given compound, we need to follow some rules:
1.Name the ions present in the compound in the order such that the name of the cation Is placed before the anion.
2.When naming within the complexion, before we write the name of the central atom, we write the name of the ligands present.
3.The names of the ligands must be written in alphabetic order.
4.In case a certain ligand is repeated, then it needs to have certain prefixes to denote the number of times it has been repeated. The prefixes mono-, di-, tri-, are used for once, twice, and thrice repetitions respectively.
5.If the ligand name is enclosed in parentheses and its number is given with the alternate prefixes bis, tris, terraces instead.
6.To denote the oxidation number of the central atom, the corresponding roman numeral must be included in parenthesis and be written after writing the name of the central atom.
7.When the central atom is negative, then we add the suffix ‘-ate’ to the name of the central atom

Note: Transition elements show a magnetic moment due to the presence of unpaired electrons to their d orbitals. With increasing the number of unpaired electrons, the spin magnetic moment value increases and vice-versa. If there is no unpaired electron then it is diamagnetic.