And a second type of reaction, a different reaction occurred in beaker Two. And this difference created something called a cell voltage. And we saw that once again, on the standing conditions, we use this formula, and on the nonstanding conditions, we use this formula. Now, I want to talk about a different type of electrochemical cell called the concentration cell. Now, in this cell, we also have two half cells or two beakers. We also have a salt bridge and a conductor with a bolt meter.