"""This figure contains a diagram of an electrochemical cell. Two beakers are shown. Each is just over half full. The beaker on the left contains a clear, colorless solution which is labeled """"H N O subscript 3 ( a q )."""" The beaker on the right contains a clear, colorless solution which is labeled """"A g N O subscript 3 ( a q )."""" A glass tube in the shape of an inverted U connects the two beakers at the center of the diagram and is labeled """"Salt bridge."""" The tube contents are colorless. The ends of the tubes are beneath the surface of the solutions in the beakers and a small grey plug is present at each end of the tube. The label """"2 N a superscript plus"""" appears on the upper right portion of the tube. A curved arrow extends from this label down and to the right. The label """"2 N O subscript 3 superscript negative"""" appears on the upper left portion of the tube. A curved arrow extends from this label down and to the left. The beaker on the left has a glass tube partially submerged in the liquid. Bubbles are rising from the grey square, labeled """"SHE anode"""" at the bottom of the tube. A curved arrow points up to the right. The labels """"2 H superscript plus"""" and """"2 N O subscript 3 superscript negative"""" appear on the liquid in the beaker. A black wire extends from the grey square up the interior of the tube through a small port at the top to a rectangle with a digital readout of """"positive 0.80 V"""" which is labeled """"Voltmeter."""" A second small port extends out the top of the tube to the left. An arrow points to the port opening from the left. The base of this arrow is labeled """"H subscript 2 ( g )."""" The beaker on the right has a silver strip that is labeled """"A g cathode."""" A wire extends from the top of this strip to the voltmeter. An arrow points toward the voltmeter from the left which is labeled """"e superscript negative flow."""" Similarly, an arrow points away from the voltmeter to the right. The solution in the beaker on the right has the labels """"N O subscript 3 superscript negative"""" a"""
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