Question
Asked Nov 18, 2019
267 views

In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide 

Al2O3

 dissolved in molten cryolite 

Na3AlF6

, resulting in the reduction of the 

Al2O3

 to pure aluminum.

 

Suppose a current of 

920.A

 is passed through a Hall-Heroult cell for 

86.0

 seconds. Calculate the mass of pure aluminum produced.

 

Be sure your answer has a unit symbol and the correct number of significant digits.

check_circle

Expert Answer

Step 1

The equation of deionization for aluminum is

help_outline

Image Transcriptionclose

Al3+3e Al

fullscreen
Step 2

The value of valency for the above equation is 3, therefore

help_outline

Image Transcriptionclose

E Z= F where E is the equivalent weight F is the Faraday constant =96500 C atomic mass E= valency 27g =9g 9 -g/C 96500

fullscreen
Step 3

The mass discharged...

help_outline

Image Transcriptionclose

m Zit 9g x920Ax86sec 96500C =7.379g

fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gas...

A: It is given that the 338 KJ of heat (q) flow out of the system during the reaction and during this p...

question_answer

Q: Question 1

A: The valence electrons of an atom are present in the outer most shell. An atom loses or gains electro...

question_answer

Q: What is the 3D representation of these chemicals BeCl2 NCl3  BrCl3 BrF5

A: Given molecules,

question_answer

Q: For the following reaction, 15.9 grams of glucose (C6H1206) are allowed to react with 12.4 grams of ...

A: The given reaction is,

question_answer

Q: In the laboratory a "coffee cup" calorimeter, or constant pressure calorimeter, is frequently used t...

A: The heat lost by metal is equal to the heat gain by the water and calorimeter. The final temperature...

question_answer

Q: In each reaction box, place the best reagent and conditions from the list below. Br 1) 2) Br H Na, N...

A: Given reactant is an alkyne and the product formed is a trans dibromo product. First, the alkyne has...

question_answer

Q: Calculate the energy required to heat 1.40 kg of graphite from 8.7 °C to 15.8 °C. Assume the specifi...

A: Click to see the answer

question_answer

Q: How would the position of a spectral line change as  the distance L between the grating and the ligh...

A: The distance between the center of the pattern and mth spectral line can be calculated using the fol...

question_answer

Q: 32P decays by B- emission. Determine the energy associated with this decay (in kJ/mol) given the fol...

A: Given that,Nuclear mass of 32P= 31.9657 amuNuclear mass of 32S= 31.95162 amuMass of electron= 5.486×...