Two parallel plates are immersed in salt water, and a battery is connected to the plates. Which of the following happens at the surface of the positively charged plate?
A)Only Na ions migrate to the plate.
B)Both Cl and Na ions migrate to the plate, with their hydration shells removed.
C)Only Cl ions migrate to the plate.
D)The hydration shells around the Na and Cl ions shield them from the electric field, so nothing happens.

Question

Quizplus · Accepted Answer

Only Cl- ions (chloride ions) migrate to the positively charged plate because they are attracted to the positive charge. Na+ ions (sodium ions) are repelled by the positively charged plate and do not migrate to it.

Two Parallel Plates Are Immersed in Salt Water, and a Battery