A concentration cell consists of the same redox couples at the anode and the cathode, with different concentrations of the ions in the respective compartments. Find the unknown concentration for the following cell. Pb(s)| Pb2+(aq, ?)|| Pb2+(aq, 0.1 M)| Pb(s) E = 0.028 V Answer in units of M.

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

< 3

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%