2RuCl3 + KBrO3 + 10KOH → 2K2RuO4 + KBr + 6KCl + 5H2O
Ruthenium(III) chloride react with potassium bromate and potassium hydroxide to produce potassium ruthenate, potassium bromide, potassium chloride and water. Potassium hydroxide - diluted solution.