Write the formulas for the following ionic compounds: (a) copper bromide (containing the Cu+ ion), (b) manganese oxide (containi

Question

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Write the formulas for the following ionic compounds: (a) copper bromide (containing the Cu+ ion), (b) manganese oxide (containi

ng the Mn3+ ion), (c) mercury iodide (containing the (Hg2)+2 ion), (d) magnesium phosphate (containing the (PO4)^-3 ion).

Chemistry

1 answer:

Anarel [2.9K] · Answer 1 · 2026-03-15T19:38:39+03:00

Answer: The formulas for the ionic compounds are:

a) $CuBr$

b) $Mn_2O_3$

c) $Hg_2I_2$

d) $Mg_3(PO_4)_2$

Explanation:

Determining the formulas for ionic compounds relies on:

The criss-cross method, wherein the oxidation states of ions are exchanged, forming the subscripts of the respective ions, resulting in a neutral compound.

(a) Copper bromide is formed based on the $Cu^+$ ion.

$Cu^++Br^-\rightarrow CuBr$

(b) Manganese oxide originates from the inclusion of the $Mn^{3+}$ ion.

$Mn^{3+}+O^{2-}\rightarrow Mn_2O_3$

(c)Mercury iodide contains the $Hg_2^{2+}$

$Hg_2^{2+}+I^-\rightarrow Hg_2I_2$

(d) Magnesium phosphate includes the $PO_4^{3-}$

$Mg^{2+}+PO_4^{3-}\rightarrow Mg_3(PO_4)_2$