[Mr-E]

Hello everyone, I recently purchased a high school chem book just for some fun but have become quite confused and was hoping someone could assist me.

Q : The concentration of MgCl2 in a certain solution was 0.3 mol L-1. State the concentration of the Cl- ions in this solution.

A : 0.6 mol L-1

Could someone please explain to me how this is possible? Very confused

[UG]

In solution, the MgCl₂ dissolves as such:

MgCl₂  Mg²⁺ + 2Cl^-

Note how one unit of MgCl₂ produces two chloride ions (Cl^-). For this reason, the concentration of the Cl^- ions is twice that of MgCl₂

[Mr-E]

Fantastic. Thank you very much for clarifying that for me