Help balancing

[Box]

Cr₂(SO₄)₃+SrI₂=CrI₂+Sr₂(SO₄)

[ChenBeier]

No you have to consider Chromium is 3+ and Strontium is 2+.

So your edukts are correct.

But the products formulas are wrong.


So how does Chromiumiodide and strontiumsulfate looks like.

[Abraman]

How would we balance an oxidation equation for lead?

[ChenBeier]

You didnt say in which condition you have the lead. For example as metall it can be oxidiesed.

Pb => Pb 2+ + 2 e-

O₂ + 4 e-=> 2 O 2-

In addition and balancing you will have 2 Pb + O₂ => 2 PbO

In an car battery you have 2 Pb 2+ => Pb + Pb 4+ for charging
discharging its the opposit. Pb 4+ + Pb => 2 Pb 2+

[Abraman]

Ah, sorry!

What would the balanced oxidation equation for lead with the lead ion having a charge of +2 be? Also what would the balanced reduction equation for gold be with the gold ion having a charge of +3?

[ChenBeier]

You can see it already in my post above Lead change from 2 to 4. Gold I guess will go down to zero.
This should be easy to develop.