---
title: "A student constructs the galvanic cell shown to model the recovery of silver ions from laboratory waste. Both solutions are at standard conditions and the salt bridge contains aqueous potassium nitrate. Relevant standard reduction potentials are given below.  | Reduction half-reaction | \\(E^\\circ\\) | |—|—:| | \\(\\text{Ag}^+\\text{(aq)}+e^-\\rightarrow\\text{Ag(s)}\\) | \\(+0.80\\text{ V}\\) | | \\(\\text{Zn}^{2+}\\text{(aq)}+2e^-\\rightarrow\\text{Zn(s)}\\) | \\(-0.76\\text{ V}\\) |  Which choice correctly identifies the electrode reactions, direction of electron flow, and salt-bridge ion migration in this cell?"
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url: "https://nerd-notes.com/ubq/119480/"
date_modified: "2026-08-19T12:40:37+00:00"
---

# A student constructs the galvanic cell shown to model the recovery of silver ions from laboratory waste. Both solutions are at standard conditions and the salt bridge contains aqueous potassium nitrate. Relevant standard reduction potentials are given below.

| Reduction half-reaction | \(E^\circ\) |
|—|—:|
| \(\text{Ag}^+\text{(aq)}+e^-\rightarrow\text{Ag(s)}\) | \(+0.80\text{ V}\) |
| \(\text{Zn}^{2+}\text{(aq)}+2e^-\rightarrow\text{Zn(s)}\) | \(-0.76\text{ V}\) |

Which choice correctly identifies the electrode reactions, direction of electron flow, and salt-bridge ion migration in this cell?

A student constructs the galvanic cell shown to model the recovery of silver ions from laboratory waste. Both solutions are at standard conditions and the salt bridge contains aqueous potassium nitrate. Relevant standard reduction potentials are given below.

| Reduction half-reaction | \(E^\circ\) |
|---|---:|
| \(\text{Ag}^+\text{(aq)}+e^-\rightarrow\text{Ag(s)}\) | \(+0.80\text{ V}\) |
| \(\text{Zn}^{2+}\text{(aq)}+2e^-\rightarrow\text{Zn(s)}\) | \(-0.76\text{ V}\) |

Which choice correctly identifies the electrode reactions, direction of electron flow, and salt-bridge ion migration in this cell?

![Draw a two-half-cell galvanic apparatus. On the left, one outlined beaker contains solution to half its height, with the solution label \(1.0\text{ M Zn(NO}_3\text{)}_2\text{(aq)}\) centered inside; one vertical metal strip immersed in it is labeled \(\text{Zn(s)}\). On the right, a matching beaker contains the same liquid volume, labeled \(1.0\text{ M AgNO}_3\text{(aq)}\); its immersed vertical metal strip is labeled \(\text{Ag(s)}\). One U-shaped salt bridge connects the two solutions and is labeled \(\text{KNO}_3\text{(aq)}\). A continuous external wire connects the tops of the metal strips through one circular voltmeter labeled \(V\). Include no arrows on the wire or salt bridge, no polarity symbols, and no visible deposits or bubbles. No other labels, text, or annotations appear.](https://nerd-notes.com/wp-content/uploads/ubq-frq-generated/stem-fig-1-1787143237-TPCX1p.jpg)

- **A.** At the zinc electrode, \(\text{Zn(s)}\rightarrow\text{Zn}^{2+}\text{(aq)}+2e^-\); at the silver electrode, \(\text{Ag}^+\text{(aq)}+e^-\rightarrow\text{Ag(s)}\). Electrons flow from zinc to silver, while \(\text{K}^+\) migrates toward zinc and \(\text{NO}_3^-\) migrates toward silver.
- **B.** At the zinc electrode, \(\text{Zn(s)}\rightarrow\text{Zn}^{2+}\text{(aq)}+2e^-\); at the silver electrode, \(\text{Ag}^+\text{(aq)}+e^-\rightarrow\text{Ag(s)}\). Electrons flow from zinc to silver, while \(\text{NO}_3^-\) migrates toward zinc and \(\text{K}^+\) migrates toward silver.
- **C.** At the silver electrode, \(2\text{Ag(s)}\rightarrow2\text{Ag}^+\text{(aq)}+2e^-\); at the zinc electrode, \(\text{Zn}^{2+}\text{(aq)}+2e^-\rightarrow\text{Zn(s)}\). Electrons flow from silver to zinc, while \(\text{NO}_3^-\) migrates toward silver and \(\text{K}^+\) migrates toward zinc.
- **D.** At the zinc electrode, \(\text{Zn(s)}\rightarrow\text{Zn}^{2+}\text{(aq)}+2e^-\); at the silver electrode, \(\text{Ag}^+\text{(aq)}+e^-\rightarrow\text{Ag(s)}\). Electrons flow from silver to zinc, while \(\text{NO}_3^-\) migrates toward zinc and \(\text{K}^+\) migrates toward silver.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119480/*