equations!

[cindyy]

the use of cast iron cookware with acidic foods such as fruits can result in significant amounts of iron(II) ions being incoroperated into the diet
a) write a blaenced ioin equation equation showing the formation of iron(II) ions in an acid solution

[cindyy]

oh really? I thought it wuold have to include like an acid :S

[monokekie]

lol, just deleted what i have written, a classic example of me not reading the question properly.

Fe(s) ----> Fe2+ (aq) + 2e-

2H+(aq) + 2e- ---->H2(g)

overall: Fe(s) + 2H+(aq) ------->  H2(g) + Fe2+ (aq)

[cindyy]

Lol okay, thanks so much

[appianway]

I think monokeke's equation is a half cell equation...

Another half cell equation would be 2H+ + 2e --> H2 (g)

So combining the two gives 2H+(aq) + Fe (s) --> H2 (g) + Fe2+ (aq)

[stonecold]

i think it is just redox with an acid such as H2SO4.
it says you have to use an acid right?

[cindyy]

i never would have thought of that :S So it is basically a redox reaction. The H+ would be the acid ?
if it was me i would have use like HCl or something. haha thanks guys!

[monokekie]

the use H+ (protons) pretty much indicates the presence of acids

[stonecold]

sweet. 

nice and simple..yay!

[cindyy]

ooh coolies. (Y) (Y)

[appianway]

Yup. Remember that in ionic equations you only write the ions that are participating in the reaction, and in this case, only the H+ (proton) reacts, and hence it doesn't matter what acid you use, seeing as the other ion's not going to react.

[monokekie]

yeh, good point

also remember that only substances that change state(or oxidation number) in a reaction will be included in ionic equations.

[cindyy]

oh okay, i will keep that in mind next time!:)