Calculate the molarity of each of the ions in a solution when 3.0 litre of 4.0 M NaCl and 4.0 litre of 2.0 M `CoCl_(2)` are mixed and diluted to 10 litre.

Explanation

`"Molarity "Na^+=1.2M" ""Molarity "Co^(2+)=0.8M" ""Molarity "Cl^(-)=2.8M`
`NaCl" "=Na^+" "Cl^(-)`
1 mole 1 mole 1 mole
`3xx4` mole 12 mole 12 mole
`CoCl_2" "=Co^(2+)" "+2Cl^(-)`
1 mole 1 mole 2 mole
`2xx4` mole 8 mole 16 mole
Total `Cl^(-)`ions = 28 mole