NaCrO2 + Br2 + NaOH => Na2 CrO4 + NaBr +H2O​

Question

NaCrO2 + Br2 + NaOH => Na2 CrO4 + NaBr +H2O​

Answer 1

2NaCrO2 + 3Br2 + 8NaOH = 2Na2CrO4 + 6NaBr +4 H2O

Cr(+3) -3e=Cr(+6) |3 2|

|6|

Br2(0) + 2e=2Br(-1)|2 3|