[crm]

Flourine + sodium bromide yields Na + FBr???
sulfurous acid + aluminum acetate yields ??
water + sulfur dioxide yields hydrogen gas + sulfite(sulfur trioxide)
lithium carbonate + barium hydroxide yields Lithium Hydroxide + Barium Carbonate??
potassium chlorate yields Chlorine + potassium trioxide???

[Albert]

Show what you have worked out so far, or, at least, what you think about each chemical reaction (i.e. products).

Then, we'll begin to help you.

[syko sykes]

for the first one: F + NaBr --> NaF + Br (add charges if you need to)

for the others at least attempt first

[Borek]

F₂!

[Will]

for the first one: F + NaBr --> NaF + Br (add charges if you need to)

and Br₂!
so overall:
F₂ + 2NaBr --> 2NaF + Br₂

[constant thinker]

"Most Common Suggestions I Make on the Forums.
1. Always start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Chemical properties can be found in the MSDS blocks to your left."

Taken right from Mitch. Take note of number 1. Add charges also.

[syko sykes]

nice catch will and borek

can someone double check me for the second one... i got this:

H₂SO₃ + (CH₃CO₂)₂AlOH --> H₂O + HSO3^- + (CH₃CO₂)₂Al⁺

[Borek]

I think you overdid this one. Start with acetate (CH₃COO)₃Al. Note that in fact you should write just net ionic reaction.

[Albert]

I think you overdid this one. Start with acetate (CH₃COO)₃Al. Note that in fact you should write just net ionic reaction.

Aren't we supposed to solved it using half reactions? 

[Borek]

Aren't we supposed to solved it using half reactions? 

SO₃^2- is a reducing agent, but somehow I can't localize nothing oxidizing.

[Albert]

2Al(CH₃COO)₃ + 3H₂SO₃ + 3H₂O -> 2Al + 6 CH₃COOH + 6 H⁺ + 3SO₄^2-

I know you're going to prove me wrong...

[Borek]

What you are proposing is basically and net ionically

2Al³⁺ + 3SO₃^2- + 3H₂O -> 2Al + 3SO₄^2- + 6H⁺

You may check half potentials to see whether this reaction is possible, but it is enough to think for a moment. Where is Al on the reactivity series? Will it survive in the presence of H⁺? No, it will react:

2Al + 6H⁺ -> 2Al³⁺ + 3H₂

If so, what you propose to happen looks like

2Al³⁺ + 3SO₃^2- + 3H₂O -> 2Al + 3SO₄^2- + 6H⁺ -> 2Al³⁺ + 3H₂ + 3SO₄^2-

or just

SO₃^2- + H₂O -> H₂ + SO₄^2-

Obvious now?

(did I ever told you how I love to use EBAS when preparing such equations? UBBC codes are generated automatically and I have balanced and correctly displayed equation in no time - and everyone thinks "gee, Borek knows how to post" )