Chemistry atom economy/ percentage yield question help! Watch

Rxmxi
Badges: 11
Rep:
?
#1
Report Thread starter 2 years ago
#1
1. Titanium can be extracted from its ore by two different methods. One uses a more reactive metal to displace the titanium:
TiO2 + 2 Mg → Ti + 2 MgO
The second method is electrolysis of the ore. The overall reaction for this method is:
TiO2 → Ti + O2
a. Calculate the atom economy for each reaction.
b. Which method is more sustainable? Explain.

For the first reaction I got an atom economy of 37.3% and second reaction 60.0%.
Is this correct?
Also, what reasoning do I use for part b? ( would I mention how the second reaction is more sustainable as it has a higher atom economy?)
0
reply
h3rmit
Badges: 15
Rep:
?
#2
Report 2 years ago
#2
(Original post by Rxmxi)
1. Titanium can be extracted from its ore by two different methods. One uses a more reactive metal to displace the titanium:
TiO2 + 2 Mg → Ti + 2 MgO
The second method is electrolysis of the ore. The overall reaction for this method is:
TiO2 → Ti + O2
a. Calculate the atom economy for each reaction.
b. Which method is more sustainable? Explain.

For the first reaction I got an atom economy of 37.3% and second reaction 60.0%.
Is this correct?
Also, what reasoning do I use for part b? ( would I mention how the second reaction is more sustainable as it has a higher atom economy?)
For the second one, you should also consider the electrical requirements (probably from fossil fuels) for electrolysis, as well as the huge thermal requirement to get molten titanium
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 31 Jul '19
  • Staffordshire University
    Postgraduate open event - Stoke-on-Trent campus Postgraduate
    Wed, 7 Aug '19
  • University of Derby
    Foundation Open Event Further education
    Wed, 7 Aug '19

Are you tempted to change your firm university choice on A-level results day?

Yes, I'll try and go to a uni higher up the league tables (143)
17.81%
Yes, there is a uni that I prefer and I'll fit in better (74)
9.22%
No I am happy with my course choice (472)
58.78%
I'm using Clearing when I have my exam results (114)
14.2%

Watched Threads

View All