Calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids. calculate the molarity of a solution prepared by diluting 165 ml of 0.688 m calcium chloride to 925.0 ml.

Answer is: molarity of calcium chloride is 0.123 M.

V₁(CaCl₂) = 165 mL; initial volume of calcium chloride solution.

c₁(CaCl₂) = 0.688 M; initial concentration.

V₂(CaCl₂) = 925.0 mL; final volume.

c₂(CaCl₂) = ?; final concentration.

Use c₁V₁ = c₂V₂.

0.688 M · 165 mL = c₂(CaCl₂) · 925 mL.

c₂(CaCl₂) = (0.688 M · 165 mL) ÷ 925 mL.

c₂(CaCl₂) = 0.123 M.

  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-