In a fuel cell there is direct conversion of mechanical energy into electricity.

a. a chemical reaction produces heat, which then produces electricity.
b. reduction takes place at the cathode.
c. there is oxidation, but no reduction.

If a || b and e || f, what is the value of y ?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Label a-f based on the table using c for concentrated and d for dilute