Give the names of the cation in each of the following compounds: a. CuS b. Ag2SO4 c. Al(ClO3)3 d. CO(OH)2 e. PbCO3.

a. Cu2+  (Copper (II) ion )   b. 2Ag+ ( Silver ion)  c. Al3+ (Aluminium (III) ion)  d. Co2+  ( Cobalt (II) ion)   e. Pb2+ ( Lead (II) ion )

Explanation:

Cations are positively charged ions.

In the question given;

CuS , known as Copper (ii) Sulphide, has Cu2+ (Copper (II) ion ) as the Cation.

Ag2SO4, Known as Silver Sulfate, has 2Ag+ ( Silver ion) as the Cation.

Al(ClO3)3, known as Aluminium Chlorate, has Al3+ (Aluminium (III) ion), as the Cation.

Co(OH)2, known as Cobalt(II) Hydroxide, has Co2+ ( Cobalt (II) ion) , as the Cation.

PbCO3, known as Lead(II) Carbonate, has Pb2+ ( Lead (II) ion ), as the Cation.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-