1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Montano1993 [528]
3 years ago
13

A voltaic electrochemical cell consists of a copper electrode in a Cu2SO4(aq) solution, and a palladium electrode in a PdSO4(aq)

solution at 25°C. The salt bridge consists of a solution of KCl(aq).
What is the concentration of the Cu+if the concentration of the PdSO4 is 0.498 M and the measured cell potential is 0.447 V?

Given: Cu+(aq) + e- ↔ Cu(s) E°=+0.521 V

and Pd2+(aq) + 2e- ↔ Pd(s) E°=+0.987 V
Chemistry
1 answer:
lianna [129]3 years ago
8 0

Answer:

\large \boxed{\textbf{1.48 mol/L}}

Explanation:

We must use the Nernst equation

E = E^{\circ} - \dfrac{RT}{zF}lnQ

1. Calculate E°

Anode:     Pd²⁺ (0.498 mol·L⁻¹) + 2e⁻ ⇌ Pd;                               E° = +0.987 V

<u>Cathode: Cu ⇌ Cu⁺ (x mol·L⁻¹) + e⁻;                                         </u>  E°=  <u>- 0.521 V </u>

Overall:   Pd²⁺(0.498 mol·L⁻¹) + 2Cu ⟶ Pd + 2Cu⁺ (x mol·L⁻¹); E° =   0.466 V

2. Calculate Q

\begin{array}{rcl}0.447 & = & 0.466 - \dfrac{8.314\times 298}{2 \times 96 485} \ln Q\\\\-0.019& = & -0.01284 \ln Q\\\ln Q & = & 1.480\\Q & = & e^{1.480}\\ & = & 4.392\\\end{array}

3. Calculate [Cu⁺]

\begin{array}{rcl}Q & = & \dfrac{\text{[Cu$^{+}$]}^{2}}{\text{[Pd]}}\\\\4.392 & = & \dfrac{{x}^{2}}{0.498}\\\\x^{2}& = & 2.187\\x & = & 1.48\\\end{array}\\\text{The concentration of Cu$^{+}$ is $\large \boxed{\textbf{1.48 mol/L}}$}

You might be interested in
Name the carnivores. Which one is not a top carnivore?
Strike441 [17]
The carnivores are the hawk, owl, and fox. 
5 0
3 years ago
Read 2 more answers
The atomic mass is equal to what?​
dsp73

Answer:

The mass number

Explanation:

I hope this helps.

4 0
3 years ago
Read 2 more answers
Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a
guapka [62]

Answer:

A

Explanation:

What the equation is tell you is that for every 3 mols of NO2 you get 2 mol of HNO3

3 mol NO2 / 2 mol HNO2 ===> 300.00 mol NO2 / x   Cross multiply

3x = 2 * 300

3x = 600                 Divide by 3

3x/3 = 600/3           Do the division

x = 200.00

3 0
3 years ago
Which of the following is not the unit of speed?
vitfil [10]

Answer:

d and c

Explanation:

that is just the answer

7 0
2 years ago
Read 2 more answers
What is the dropped down number in a chemical formula that tells the number of atoms of a particular element? *
densk [106]
The lack of a number preceding the carbon symbol C and the compound formula CO2 shows that there is one carbon atom and one carbon dioxide molecule. Subscript numbers in chemical formulas represent the number of atoms or molecules immediately preceding the subscript.
3 0
3 years ago
Read 2 more answers
Other questions:
  • Be sure to answer all parts.
    5·2 answers
  • A bluebird lives in a maple tree. It builds a nest in the tree, where its eggs can be protected from the harsh environment. This
    15·1 answer
  • A molecule containing a central atom with sp hybridization has a(n) ________ electron geometry. A molecule containing a central
    11·1 answer
  • Glycogen ________. Glycogen ________. forms the regulatory molecules known as enzymes serves as a structural component of human
    7·1 answer
  • Which is the equation of a circle with its center at (-4,2) and a radius of 4?
    15·1 answer
  • &lt; Question 3 of 25
    13·1 answer
  • How many molecules are in 88g of carbon dioxide?
    9·2 answers
  • Calculate the percentage of sodium and carbon and oxygen in sodium carbonate​
    14·1 answer
  • PLS HELP QUICK ALOTTT OF POINTS
    8·1 answer
  • Of the following, which is NOT a way to classify a biome?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!