• Best of luck to the class of 2024 for their HSC exams. You got this!
    Let us know your thoughts on the HSC exams here
  • YOU can help the next generation of students in the community!
    Share your trial papers and notes on our Notes & Resources page
MedVision ad

Chemical formulas for shipwrecks (1 Viewer)

99 plus

New Member
Joined
Oct 12, 2012
Messages
27
Gender
Male
HSC
2013
Those who are doing Shipwrecks, see for the long chemical formulas of rusting and the sulfate reducing bacteria, do we have to know all the steps of the chemical reactions? Or just knowing the Oxidaton, reduction and Overall chemical formula is enough? How are you memorizing it?
 

madharris

Well-Known Member
Joined
Oct 23, 2011
Messages
2,160
Gender
Undisclosed
HSC
N/A
You should know all the steps incase they ask a question on it.

It's only a few steps, it shouldn't be too difficult to learn if you haven't already :)
 

HeroicPandas

Heroic!
Joined
Mar 8, 2012
Messages
1,547
Gender
Male
HSC
2013
You are 99plus so you should know this lol

For sulfate reducing bacteria, you only need 1 equation

SO4 (2-) (aq) + 10H+ (aq) + 8 electrons --> 4 waters + H2S (aq) (theres one that produces hydroxide ions...but my teacher said dw about it)

To remember this, just remember coefficients, and say this phrase in your head: "ten, eight, 4 waters"
 

Queenroot

I complete the Squar3
Joined
Sep 11, 2011
Messages
7,487
Location
My bathtub
Gender
Female
HSC
N/A
Those who are doing Shipwrecks, see for the long chemical formulas of rusting and the sulfate reducing bacteria, do we have to know all the steps of the chemical reactions? Or just knowing the Oxidaton, reduction and Overall chemical formula is enough? How are you memorizing it?
Just know the redox ones. Lol.
 

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top