Question

PROBLEMS 10.1. A nickel plating bath contains 58,000 mg/L nickel. The dragout rate is 0.05 L/min. The parts being plated are placed in a 200-L dead rinse tank, which initially contained nickel- free water, immediately after plating.Draw a plot of the nickel concentration in the dead rinse tank and of the dead rinse tank dragout) with time. Assume that evaporative losses are minimal. 10.2. For the operation in D

Answer 1

The concentration of nickel in nickel plating bath = 58000 mg/L = {58 g/(58.693 g.mol^-1)}/L = 0.9882 mol/L

The drag-out rate = 0.05 L/min

Therefore, if you draw a plot of nickel concentration (in the dead rinse tank of 200 L capacity) versus time (in min), then the concentration decreases with time.

i.e. The slope of the line is negative (-ve).