The solid anhydrous solid cocl2 is blue in color. because it readily absorbs water from the air, it is used as a humidity indicator to monitor if equipment (such as a cell phone) has been exposed to excessive levels of moisture. predict what product is formed by this reaction, and how many unpaired electrons this complex will have.

is formed and it has three unpaired electrons.

Explanation:

Blue reacts with water to produce pink colored complex.

In this complex, ion forms an octahedral complex with six ligands.

As is a weak field ligand therefore ion remains in low spin state.

Hence electronic configuration of ion in this octahedral geometry is with total three unpaired electrons.

  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-