Question

Give the names and charges of the cation and anion in each of the following compounds:________.
(a) CuS, (b) Ag2SO4, (c) Al(ClO3)3, (d) Co(OH)2 and (e) PbCO3

Answer 1

Answer:

(a) $Cu^{2+}S^{2-}$: copper (II) sulfide or cupric sulfide.

(b)  $Ag^+_2(SO_4)^{2-}$: silver sulfate.

(c) $Al^{3+}(ClO_3)_3^-$: aluminum chlorate.

(d) $Co^{2+}(OH)^-_2$: cobalt (II) hydroxide.

(e) $Pb^{2+}(CO_3)^{2-}$: lead (II) carbonate.

Explanation:

Hello,

In this case, we proceed by exchanging the subscripts between the cation and anion for each case as follows:

(a) CuS: cation is cupper (II) and anion is sulfide, thus the name is copper (II) sulfide or cupric sulfide.

$Cu^{2+}S^{2-}$

(b) Ag₂SO₄: cation is silver ion and anion is sulfate, thus the name is silver sulfate.

$Ag^+_2(SO_4)^{2-}$

(c) Al(ClO₃)₃: cation is aluminum ion and anion is chlorate, thus the name is aluminum chlorate.

$Al^{3+}(ClO_3)_3^-$

(d) Co(OH)₂: cation is cobalt (II) and anion is hydroxide, thus the name is cobalt (II) hydroxide.

$Co^{2+}(OH)^-_2$

(e) PbCO₃: cation is lead (II) and anion is carbonate, thus the name is lead (II) carbonate.

$Pb^{2+}(CO_3)^{2-}$

Regards.