AP Chemistry
9.9 Cell Potential and Free Energy
9.8 Galvanic (Voltaic) and Electrolytic Cells
A student constructs a galvanic cell under standard conditions (
\(298\text{ K}\), \(1.0\text{ M}\) solutions) using two beakers connected by a salt bridge and an external wire with a voltmeter.
Beaker 1 contains a strip of \(\text{Zn(s)}\) immersed in \(1.0\text{ M }\text{Zn(NO}_3)_2\text{(aq)}\).
Beaker 2 contains an inert \(\text{Pt(s)}\) electrode immersed in an equimolar solution containing both \(1.0\text{ M }\text{Fe(NO}_3)_2\text{(aq)}\) and \(1.0\text{ M }\text{Fe(NO}_3)_3\text{(aq)}\).
The relevant standard reduction potentials at \(298\text{ K}\) are given below:
\[\text{Fe}^{3+}\text{(aq)} + \text{e}^- \rightarrow \text{Fe}^{2+}\text{(aq)} \quad E^\circ = +0.77\text{ V}\]
\[\text{Zn}^{2+}\text{(aq)} + 2\text{e}^- \rightarrow \text{Zn(s)} \quad E^\circ = -0.76\text{ V}\]
Based on the information provided, what is the standard cell potential, \(E^\circ_{\text{cell}}\), for the galvanic cell?
\(298\text{ K}\), \(1.0\text{ M}\) solutions) using two beakers connected by a salt bridge and an external wire with a voltmeter.
Beaker 1 contains a strip of \(\text{Zn(s)}\) immersed in \(1.0\text{ M }\text{Zn(NO}_3)_2\text{(aq)}\).
Beaker 2 contains an inert \(\text{Pt(s)}\) electrode immersed in an equimolar solution containing both \(1.0\text{ M }\text{Fe(NO}_3)_2\text{(aq)}\) and \(1.0\text{ M }\text{Fe(NO}_3)_3\text{(aq)}\).
The relevant standard reduction potentials at \(298\text{ K}\) are given below:
\[\text{Fe}^{3+}\text{(aq)} + \text{e}^- \rightarrow \text{Fe}^{2+}\text{(aq)} \quad E^\circ = +0.77\text{ V}\]
\[\text{Zn}^{2+}\text{(aq)} + 2\text{e}^- \rightarrow \text{Zn(s)} \quad E^\circ = -0.76\text{ V}\]
Based on the information provided, what is the standard cell potential, \(E^\circ_{\text{cell}}\), for the galvanic cell?
Similar Questions
Tools for a 5
AP aligned mock tests to help you get a 5.
With grading, adaptive explanations, and more.
Find a Quiz
Find, solve, and grade every AP FRQ ever.
Find an FRQ
Stuck on AP Chemistry? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor
Learn AP Physics from scratch, quickly. This is the only course you'll need for the year.
A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee.
Explore the Course