The weight loss of an aluminum (Al) alloy corroding in HCI acid was observed to be 0.250 g/cm2 after

3 answers
Question:

The weight loss of an aluminum (Al) alloy corroding in HCI acid was observed to be 0.250 g/cm2 after an 8 h immersion period. What is the corresponding corrosion current density in mA/em2, assuming that all the corrosion is due to the reaction: Al → Al3+ + 3e
The atomic weight of Al is 26.98 g/mol.

Answers

I = 0.0931 A/cm^2 or 93.1 mA/cm^2

Explanation:

The computation of the corresponding corrosion is shown below:

As we know that

The mathematical form  is

[tex]m=\frac{Q}{F} \frac{M}{z}[/tex]

where,

m =  substance mass

Q= total electric charge

F= Faradays constant i.e. = 96,500 C/mol

M = Substance molar mass

z = number of electrons transferred

Now  

Q = It

where

I = current

And t = time

[tex]m=\frac{Q}{F} \frac{M}{z}[/tex]

So,

[tex]I = \frac{mFz}{tM}[/tex]

Now it is mentioned that

z=3, M=26.98 g/mol, m=0.25 g/cm2

So,

[tex]I= \frac{0.25 g/cm^2 \times 96,500 C/mol \times 3}{((8\times60\times60 s)} \times 26.98 g/mol)[/tex]

Hence,

I = 0.0931 A/cm^2 or 93.1 mA/cm^2

A.

where are the choice options?

Similar Solved Works

4 answers

Osteoporosis affects which body system? O a. Skeletal b. Urinary C. Muscular d. Reproductive

Osteoporosis affects which body system? O a. Skeletal b. Urinary C. Muscular d. Reproductive...
3 answers

Where did scientists like einstein, bethe, fermi, teller, and bloch emigrate in order to escape persecution and pursue scientific

Where did scientists like einstein, bethe, fermi, teller, and bloch emigrate in order to escape persecution and pursue scientific research? a. italy b. france c. germany d. the united states...
10 answers

Consider the following data on real gdp per capita in the united states: year us real gdp per capita

Consider the following data on real gdp per capita in the united states: year us real gdp per capita 1950 $14,432 1960 $17,335 1970 $23,236 1980 $28,472 1990 $36,005 2000 $44,503 2010 $47,790 2011 $48,186 2012 $48,884 2013 $49,247 2014 $50,051 (a) calculate the percentage growth rates in re...
3 answers

Dante has been putting one penny in his bank everyday. now he has $1.61. for how many

Dante has been putting one penny in his bank everyday. now he has $1.61. for how many weeks has dante been adding pennies to his bank?...
4 answers

State is when the electron isclosest to the nucleus.​

State is when the electron isclosest to the nucleus.​...
3 answers

What are the steps in simplifying the expression (x+4-x)​

What are the steps in simplifying the expression (x+4-x)​...
3 answers

With whom did most american indians ally during the french and indian war? a. only france b. only england

With whom did most american indians ally during the french and indian war? a. only france b. only england c. only france and spain d. their trading partners...
10 answers

What is the gcf of 36 and 54,32and56,100and75,28and49,35and50 and 64and88?

What is the gcf of 36 and 54,32and56,100and75,28and49,35and50 and 64and88?...
3 answers

(5) A 4 kg. object rests on a flat, horizontal surface with a staticcoefficient of friction of 0.25. What minimum force will be necessary tostart the

(5) A 4 kg. object rests on a flat, horizontal surface with a static coefficient of friction of 0.25. What minimum force will be necessary to start the object in motion? If the coefficient was smaller, what effect would that have? If it was larger?...
5 answers

Changing the length of an air column will alter its a. doppler effect b. beats c. natural frequency

Changing the length of an air column will alter its a. doppler effect b. beats c. natural frequency d. destructive interference...
4 answers

Use this word in a sentence skeleton framework factory warehouse protect support

Use this word in a sentence skeleton framework factory warehouse protect support...
3 answers

Which of these is not a method used to calculate finance charges? • od a. adjusted balance b. average

Which of these is not a method used to calculate finance charges? • od a. adjusted balance b. average daily balance usual balance previous balance...
9 answers

Investigate the following list of performances.Baile de Flamenco (baile)Florencia en el Amazonas (ópera)Argentine Tango (baile)Baile

Investigate the following list of performances. Baile de Flamenco (baile) Florencia en el Amazonas (ópera) Argentine Tango (baile) Baile Folklórico de México (ballet) Festival Internacional Santiago a Mil (festival de artes escénicas) Chose the performance that most appeals to you. Then, use ...
10 answers

HELP Urg

HELP Urg [tex]HELPPPP Urggggg[/tex]...
3 answers

A washing machine can hold6 kilograms of laundry, how many loads does he need to do?kg of laundry in each load. If Randy has4Plzzz show work

A washing machine can hold 6 kilograms of laundry, how many loads does he need to do? kg of laundry in each load. If Randy has 4 Plzzz show work...
3 answers

Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript

Use the given information to find the number of degrees of​ freedom, the critical values chi Subscript Upper L Superscript 2 and chi Subscript Upper R Superscript 2​, and the confidence interval estimate of sigma. It is reasonable to assume that a simple random sample has been selected from a po...
4 answers

Gasifica las Igles reacciones coocandoen el parentesis el comero que comesponda). CH₃-CH₃ + Bi2 luz CH3- CH₂ Br+ HBr​

Gasifica las Igles reacciones coocando en el parentesis el comero que comesponda). CH₃-CH₃ + Bi2 luz CH3- CH₂ Br+ HBr​...
4 answers

When might changes in fiscal policy be made?when it is time to collect property taxeswhen inflation

When might changes in fiscal policy be made? when it is time to collect property taxes when inflation has gotten out of control when the government needs to borrow money when it is time to enforce property rights...
4 answers

Please helpp meee its hard for some reason

Please helpp meee its hard for some reason [tex]Please helpp meee its hard for some reason[/tex]...
9 answers

For triangle HIJ, if ÐI = 70°, j = 5.35 cm, and h = 3.80 cm, use the cosine law to solve for side

For triangle HIJ, if ÐI = 70°, j = 5.35 cm, and h = 3.80 cm, use the cosine law to solve for side i. Round your answer to the nearest hundredth of a centimetre. HELP YALL...

-- 0.017179--