Write the net ionic equation for the reaction of potassium dichromate(VI), K 2 Cr 2 O 7 with sodium sulphite, Na 2 SO 3 , in an acid solution to give chromium(III) ion and the sulphate ion. (a) What is the net ionic equation for the given reaction? Select the correct net ionic equation for the reaction.

Options

1. ACr 2 O 7 2- + 3SO 3 2- + 16H + → 2Cr 3+ + 3SO 4 2- + 8H 2 O
2. BK 2 Cr 2 O 7 + Na 2 SO 3 + 2HCl → 2Cr 3+ + 2SO 4 2- + 2Na + + 2K + + 2Cl -
3. C2K + + Cr 2 O 7 2- + 3Na + + 3SO 3 2- + 8H + → 2Cr 3+ + 3SO 4 2- + 3Na + + 2K + + 4H 2 O
4. D2K + + Cr 2 O 7 2- + 3Na + + 3SO 3 2- + 16H + → 2Cr 3+ + 3SO 4 2- + 3Na + + 2K + + 8H 2 O