Ag wire A 100.0-ml solution containing 0.100 0 M NaCl was titrated with 0.100 O M AgNO3, and the voltage of the cell shown in Figure 15-6 was monitored. Calculate the voltage after the addition of 65.0 mL of AgNO3. Ag (aq) Double- junction saturated calomel electrode Figure 15-6 Use of Ag and calomel electrodes to measure [Ag+]. The calomel electrode has a double junction, like that in Figure 15-4. The outer compartment of the electrode is filled with KNO3, so there is no direct contact between Cl- in the inner compartment and Ag+ in the beaker