Fundamentals L, #35

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Megan Vu 1J
Posts: 91
Joined: Thu Jul 25, 2019 12:15 am

Fundamentals L, #35

Postby Megan Vu 1J » Sun Sep 29, 2019 5:09 pm

In Fundamentals L #35, it asks for the equations to be balanced first before solving for the mass of iron, in kilograms, needed to produce 2.50 t of NaBr. The equations listed are:
Fe + Br2 --> FeBr2
FeBr2 + Br2 --> Fe3Br8
FeBr2 + Na2CO3 --> NaBr + CO2 + Fe3O4

However, after balancing the first two equations, I could not balance the third equation. Was anyone able to balance the third equation?

DarrenKim_3G
Posts: 111
Joined: Fri Sep 20, 2019 12:17 am

Re: Fundamentals L, #35

Postby DarrenKim_3G » Sun Sep 29, 2019 5:39 pm

Hi, are you sure the final equation isn't?

Fe3Br8 + Na2CO3 --> NaBr + CO2 + Fe3O4

VPatankar_2L
Posts: 89
Joined: Thu Jul 25, 2019 12:17 am
Been upvoted: 1 time

Re: Fundamentals L, #35

Postby VPatankar_2L » Sun Sep 29, 2019 6:04 pm

If you go on the Chemistry 14A website, the professor posted a link to a document that shows the errors in the solution manual and textbook. It's called "Solution Manual Errors" and it says the following:
L.35 in the textbook question:
In the third reaction step the compound "FeBr2" needs to be "Fe3Br8".

Hope that helps :)

Brittany Tran 3I
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Re: Fundamentals L, #35

Postby Brittany Tran 3I » Mon Sep 30, 2019 4:51 pm

the balanced equation should be Fe3Br8 + 4Na2CO3 -> 8NaBr + 4CO2 + Fe3O4


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