[cammi]

Hi there,

Can anyone help me with balancing the following equation

Write a chemical equation for: A solution containing dichromate Cr2O7-2 is produced by heating an acidic, aqueous solution of chromium (III) chloride with NaBiO3.  (another product of the reaction is Bi3+.

Help would be appreciated.

Thanks!
Cammi

[DevaDevil]

What do you think the reactants and products will be?

[cammi]

I thought that the product would be dichromate Cr207-2 with Bi3+ being also part of the product.  It’s the part where the dichromate is heated in the aqueous acidic chromium (III) chloride solution that is giving me problems on the reactants side of the equation.  I am not getting the reactants and the products balanced.

Many thanks.

[AWK]

Try to balance both equations

CrCl₃ + NaBiO₃ + H₂SO₄ = Na₂Cr₂O₇ + Na₂SO₄ + Bi₂(SO₄)₃ + Cl₂(g) + H₂O

or Cr³⁺ + BiO₃^- + H⁺ = Cr₂O₇^2- + Bi³⁺ + H₂O

[cammi]

Wow, thanks so much for the help. I really appreciate it!

[AWK]

I wonder how much time you'll need for balancing the full reaction by hand.
It is better to use Bi(NO3)3 instead of BiCl3 - then the redox reaction is quite easy