Calculate the empirical formula of the hydrated nickel(II) iodide crystals.
Name the type of particles which carry charge through the copper wires.
Name the type of particles which carry charge through the molten nickel(II) iodide.
Predict the products of the electrolysis of molten nickel(II) iodide. Write an ionic half-equation for the formation of one of these products.
Explain why the mass of the negative electrode increased in both sets of apparatus.
Name the gas that formed the bubbles seen in apparatus A.
Explain why the mass of the positive electrode decreased in apparatus B.
Suggest what happens to the colour of the solution in apparatus A and apparatus B as the electrolysis progresses. Explain your answer. colour of the solution in apparatus A colour of the solution in apparatus B explanation