Cadmium poisoning: symptoms, diagnosis and treatment | Emergency Live

Even though the toxicity of cadmium has become a concern, nickel-cadmium (nicad) batteries are still used commonly in many devices. The overall cell reaction is Cd(s) 2 NiO(OH)(s) 2 H2 O(l) ⟶2 Ni(OH)(s) Cd(OH)2(s) A certain nicad battery weighs 18.3 g and has a capacity of 300 . mA ·h (that is, the cell can store charge equivalent to a current of 300 . mA flowing for 1 h ). (a) What is the capacity of this cell in coulombs? (b) What mass of reactants is needed to deliver 300 . mA - h? (c) What p