Calculate the molarity of a solution containing 5 g of NaOH dissolved in the product of H ₂- O ₂ fuel cell operated at 1 A current for 595.1 hours. (Assume F =96500 C / mol of electron and molecular weight of NaOH as .40 ~g ~mol ⁻¹ ) .

Step-by-step solution

The overall reaction of H ₂- O ₂ fuel is, 2 H ₂+ O ₂ 2 H ₂ O Thus 4 ~F =4 96500 C produce water =2 ~mol =36 ~g aligned Charge actually passed & =i t & =1 595.1 60 60 & =2142360 C aligned aligned & Water produced = 36 4 96500 2142360 & 200 ~g or 200 ~mL & Molarity of NaOH solution = 5 40 1 200 1000 & =0.625 M aligned