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
devlian [24]
3 years ago
5

The voltage generated by the zinc concentration cell described by the line notation Zn ( s ) ∣ ∣ Zn 2 + ( aq , 0.100 M ) ∥ ∥ Zn

2 + ( aq , ? M ) ∣ ∣ Zn ( s ) is 25.0 mV at 25 °C . Calculate the concentration of the Zn 2 + ( aq ) ion at the cathode.
Chemistry
1 answer:
maksim [4K]3 years ago
7 0

<u>Answer:</u> The concentration of Zn^{2+} ion at cathode is 0.704 M

<u>Explanation:</u>

The half reactions for the cell is:

<u>Oxidation half reaction (anode):</u>  Zn(s)\rightarrow Zn^{2+}+2e^-

<u>Reduction half reaction (cathode):</u>  Zn^{2+}+2e^-\rightarrow Zn(s)

In this case, the cathode and anode both are same. So, E^o_{cell} will be equal to zero.

To calculate cell potential of the cell, we use the equation given by Nernst, which is:

E_{cell}=E^o_{cell}-\frac{0.0592}{n}\log \frac{[Zn^{2+}_{anode}]}{[Zn^{2+}_{cathode}]}

where,

n = number of electrons in oxidation-reduction reaction = 2

E_{cell} = 25.0 mV = 0.025 V   (Conversion factor: 1 V = 1000 mV)

[Zn^{2+}_{cathode}] = ? M

[Zn^{2+}_{anode}] = 0.100 M

Putting values in above equation, we get:

0.025=0-\frac{0.0592}{2}\log \frac{0.100}{[Zn^{2+}_{anode}]}

[Zn^{2+}_{anode}]=0.704M

Hence, the concentration of Zn^{2+} ion at cathode is 0.704 M

You might be interested in
What are clouds composed of?
bonufazy [111]
<span>Clouds are made of tiny drops of water or ice crystals that settle on dust particles in the atmosphere. The droplets are so small - a diameter of about a hundredth of a millimetre - that each cubic metre of air will contain 100 million<span>droplets</span></span>
8 0
3 years ago
Read 2 more answers
Balance the following chemical reaction: _NaOH + _H2SO4 -----&gt;_Na2SO4 +_H20
Dima020 [189]

Answer:

Sodium Hydroxide + Sulfuric Acid = Sodium Sulfate + Water

2NaOH + H2SO4 → Na2SO4 + 2H2O

Explanation:

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.

Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F.

Ionic charges are not yet supported and will be ignored.

Replace immutable groups in compounds to avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will.

Compound states [like (s) (aq) or (g)] are not required.

You can use parenthesis () or brackets [].

8 0
3 years ago
An aqueous 0.300 M glucose solution is prepared with a total volume of 0.150 L. The molecular weight of
kherson [118]

Answer:

We need 8.11 grams of glucose for this solution

Explanation:

Step 1: Data given

Molarity of the glucose solution = 0.300 M

Total volume = 0.150 L

The molecular weight of glucose = 180.16 g/mol

Step 2: Calculate moles of glucose in the solution

Moles glucose = molarity solution * volume

Moles glucose = 0.300 M * 0.150 L

Moles glucose = 0.045 moles glucose

Step 3: Calculate mass of glucose

MAss glucose = moles glucose* molecular weight of glucose

MAss glucose = 0.045 moles * 180.16 g/mol

MAss glucose = 8.11 grams

We need 8.11 grams of glucose for this solution

6 0
3 years ago
Abdid is an astronomer who has been observing objects that orbit the Sun in the asteroid belt. He finds a previously undiscovere
Elza [17]
Since it is round and it is the asteroid belt it is most likely that he found a dwarf planet 
6 0
3 years ago
Read 2 more answers
The accepted value for R is 0.08206 L·atm/K·mol or 8.314 L·kPa/K·mol, depending on the unit of pressure used. (Your answer may d
Alecsey [184]

Answer:

poop

Explanation:

8 0
3 years ago
Other questions:
  • Which of the following gases is NOT found in Earth’s atmosphere?
    5·2 answers
  • What is an example of radioactive decay
    7·1 answer
  • 4. A 1.802 gram sample of unknown compound contains 0.721 grams of carbon, 0.121 grams of hydrogen and 0.960 grams of oxygen. Th
    14·1 answer
  • How many grams of nitric acid are needed to produce 30.0 g of water?
    9·1 answer
  • What is the density, in g/mL, of a cube of lead (Pb) that weighs 0.371 kg and has a volume of 2.00 in.3
    8·1 answer
  • Which element has six energy levels?
    13·2 answers
  • This process is called..
    6·2 answers
  • You need 150g of pure lithium for an experiment you're doing. You have 675g of lithium oxide (Li2O). Can you extract all the lit
    14·1 answer
  • How many molecules are contained in 2.34 moles of carbon monoxide?
    15·1 answer
  • On this number line, zero represents sea level. Plot the following points based on the description provided by dragging and drop
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!