A solution is prepared by mixing 0.10 L of 0.12 M sodium chloride (NaCl) with 0.23 L of a 0.18 M magnesium chloride (MgCl2) solution. What is the pCl of the resulting solution?

Edit: Someone commented saying not sure what they are to calculate. I am unsure how to be more specific this is the exact problem given. We need to find the pCl- of the solution from the dilution stated above.