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AP Chemistry
9.8 Galvanic (Voltaic) and Electrolytic Cells
IntermediateMCQConceptualExperimental18k
A line drawing in grayscale depicting a galvanic cell apparatus. On the left, a glass beaker contains a liquid solution labeled $1.0\text{ M }\text{Zn(NO}_3)_2\text{(aq)}$, with a solid rectangular electrode shaded light gray labeled $\text{Zn(s)}$ immersed in it. On the right, a second glass beaker contains a liquid solution labeled $1.0\text{ M }\text{Cu(NO}_3)_2\text{(aq)}$, with a solid rectangular electrode shaded dark gray labeled $\text{Cu(s)}$ immersed in it. A wire connects the $\text{Zn(s)}$ electrode to a circular voltmeter labeled $\text{V}$, which connects via wire to the $\text{Cu(s)}$ electrode. An inverted U-tube salt bridge labeled $\text{KNO}_3\text{(aq)}$ bridges the two beakers with its open ends submerged in each solution. No other particles, labels, text, or annotations appear.
Galvanic cell apparatus consisting of $\text{Zn(s)}\mid\text{Zn}^{2+}\text{(aq)}$ and $\text{Cu(s)}\mid\text{Cu}^{2+}\text{(aq)}$ half-cells.
A student constructs the galvanic cell shown in the diagram, consisting of a $\text{Zn(s)}$ electrode immersed in $1.0\text{ M }\text{Zn(NO}_3)_2\text{(aq)}$ and a $\text{Cu(s)}$ electrode immersed in $1.0\text{ M }\text{Cu(NO}_3)_2\text{(aq)}$. A salt bridge filled with $\text{KNO}_3\text{(aq)}$ connects the two solutions, and the initial cell potential is measured as $+1.10\text{ V}$. During the trial, the student lifts the salt bridge completely out of the solutions. Which of the following best predicts and explains the effect of removing the salt bridge on the measured cell potential?

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