Q2.103P - Chemistry: Molecular Nature Of Matter And Change

Question

Correct the formula to match the name of the following compounds:

1. Iron(III) oxide,;$\mathit{F}{\mathit{e}}_{\mathbf{3}}{\mathit{O}}_{\mathbf{4}}$
2. Chloric acid,;$\mathit{H}\mathit{C}\mathit{l}$
3. Mercuric oxide,;$\mathit{H}{\mathit{g}}_{\mathbf{2}}\mathit{O}$
4. Dichlorineheptaoxide,;$\mathit{C}{\mathit{l}}_{\mathbf{2}}{\mathit{O}}_{\mathbf{6}}$

Step-by-Step Solution

Answer

(a) The corrected formulaof Iron(III) oxide is .$F{e}_2{O}_3$

(b) The corrected formula of Chloric acid is.$HCl{O}_3$

(c) The corrected formula of Mercuric oxide is.$HgO$

(d) The corrected formula of Dichlorine heptaoxideis.$C{l}_2{O}_7$

Step 1: To Correct the formula to match the name of Iron(III) Oxide, F e 3 O 4

The Molecule is an ionic compound so the number of atoms depends on the charge of each ion.

The charge of iron is +3 and the charge of oxygen is -2.The charges will just interchange as subscripts.

$F{e}^{3+}{O}^{2-}\to F{e}_2{O}_3$

$\mathit{F}{\mathit{e}}_{\mathbf{2}}{\mathit{O}}_{\mathbf{3}}$would be the correct formula for Iron(III) oxide.

Step 2: To Correct the formula tomatch the name of Chloric acid, H C l

The chloric comes from the Polyatomic ion chlorate with the formula $Cl{O}_3^{-}$.

To make it into acid, we must add a hydrogen as much as the magnitude of its charge. Since$Cl{O}_3^{-}$ has a charge 1, we need to add one hydrogen atom.

Therefore, The formula of chloric acid is$HCl{O}_3$ .

$HCl{O}_3$ would be the correct formula for Chloric acid.

Step 3: To Correct the formula to match the name of Mercuric oxide Hg 2 O ,

The Mercuric has a charge of +2, and we know that oxide has a charge of -2.

The charges will just interchange as sunscripts. The subscript should also be reduce to the smallest whole numbers that retain the ratio of the atoms.

$\mathit{H}{\mathit{g}}^{\mathbf{2}\mathbf{+}}{\mathit{O}}^{\mathbf{2}\mathbf{-}}\mathbf{\to }\mathit{H}\mathit{g}\mathit{O}$

$HgO$would be the Correct Formula for mercuric oxide.

Step 4: To Correct the formula tomatch the name of Dichlorineheptaoxide C l 2 O 6 ,

The Molecule above is covalent.Therefore, the number of atoms in the compound is based on its prefixes.The prefix di means two, so there are 2 chlorine and prefix hepta means seven, so there should be seven oxygen atoms.

Therefore, The Formula of dichlorine heptaoxide is $C{l}_2{O}_7$.

$C{l}_2{O}_7$would be the Correct Formula for Dichlorine heptaoxide