For each solution below determine the p-values for each ion indicated.a) A solution that is 0.415 M in NaCl and 0.346 M in NH4Cl.

For each solution below determine the p-values for each ion indicated.a) A solution that is 0.415 M in NaCl and 0.346 M in NH4Cl.

part a) askes for PNa, Pcl and PNH 

I know that we must use PX=-log(X) but I am still confused