Chemistry

Chemistry

Problem

A student connects a battery and a light-bulb in series with two graphite electrodes immersed in four separate beakers, each at the conditions listed. I. Solid NaCl at 25 ∘C25\,^{\circ}\text{C} II. Molten NaCl maintained at 820 ∘C820\,^{\circ}\text{C} III. Solid Cu metal at 25 ∘C25\,^{\circ}\text{C} IV. 0.50 M0.50\,\text{M} NaCl(aq) at 25 ∘C25\,^{\circ}\text{C} After the switch is closed, in which beakers will the bulb light brightly? a) III and IV only\text{III and IV only} b) II, III, and IV only\text{II, III, and IV only} c) II and IV only\text{II and IV only} d) I and II only\text{I and II only}

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