iodide(out) + chloride(in) => iodide(in) + chloride(out)
iodide(out) + chloride(in) => iodide(in) + chloride(out)
iodide(out) + chloride(in) => iodide(in) + chloride(out)
iodide(out) + chloride(in) => iodide(in) + chloride(out)