stephennn

complex ions weren't on the exam last year, and the reactions were really easy..... you also have to answer a question about them and i really just dont think they can ask you about a complex ion.....it just doesn't seem like it would be on the ap.

Peytoncline

i need to clear up something about H2SO4..

so, the ap graders will take either:

(1) H^+ + HSO4^-

or

(2) 2H^+ + SO4^2-

correct?

jcll2002

yeah you can do either according to my teach

Peytoncline

ok, good.. i always choose the latter way because it's usually easier to balance.. and it makes me see other things more easily

braves09

ok, thanks gfaith

wg90210

NO. you must balance.

wg90210

also, Hydrogen exists as a diatomic gas

luber43

1) what's a complex ion?
2) what does diatomic mean again?

thegeneralguy

Those aren't hydrogen, they're technically free protons. But free protons don't exist in water, so they become hydronium.

1) complex ion: central atom(s) with ligands. Generally a lewis acid/base product.

2) 2 atoms

sushant269

a complexed ion is basically what happens when a transition metal and a ligand react. A ligand would be H20, NH3, etc look em up. Typically, you make twice the amount of ligand as the metals charge. Al3+ + NH3 = Al(NH3)6

Diatomic means two atoms. H2, Cl2, Br2, I2.

murderah

Yeah the halogens exist only as diatomic atoms in nature.

[Ag(NH3)2]+ is also an important complex ion. Complex ions always have a charge (duh.. ION). So Al and NH3 would be [Al(NH3)6]+3

sushant269

ya make sure there is a charge.

wg90210

The Test Is Tomorrow

chaz90

Thank you wg90210