Compute the answer of the following problem
Problem- The electrochemical cell potential of a water sample of unknown Fe2+ potential was measured relative to that of a standard 0.100 M Fe(NO3)3 solution, and was found to be: ECell = +0.072 V. Molecular Weight of Fe: 55.84 g/mol.
Part 1- What is the Fe3+ concentration in the water sample, in mg/L?
I want help to find the Fe3+ concentration in the water.