Vyvážení chemické rovnice
Vyčísli následující rovnici:
\( \textrm{NaBrO}_3 + \textrm{KI} + \textrm{H}_2\textrm{SO}_4 → \textrm{I}_2+\textrm{NaBr}+ \textrm{K}_2\textrm{SO}_4 + \textrm{H}_2\textrm{O} \)
\( \textrm{NaBrO}_3 + 6\ \textrm{KI} + 2\ \textrm{H}_2\textrm{SO}_4 → 2\ \textrm{I}_2+\textrm{NaBr}+ 3\ \textrm{K}_2\textrm{SO}_4 + 2\ \textrm{H}_2\textrm{O} \)
\( \textrm{NaBrO}_3 + 5\ \textrm{KI} + 3\ \textrm{H}_2\textrm{SO}_4 → 3\ \textrm{I}_2+\textrm{NaBr}+ 2\ \textrm{K}_2\textrm{SO}_4 + 3\ \textrm{H}_2\textrm{O} \)
\( \textrm{NaBrO}_3 + 6\ \textrm{KI} + 3\ \textrm{H}_2\textrm{SO}_4 → 3\ \textrm{I}_2+\textrm{NaBr}+ 3\ \textrm{K}_2\textrm{SO}_4 + 3\ \textrm{H}_2\textrm{O} \)
\( \textrm{NaBrO}_3 + 4\ \textrm{KI} + 2\ \textrm{H}_2\textrm{SO}_4 → 2\ \textrm{I}_2+\textrm{NaBr}+ 2\ \textrm{K}_2\textrm{SO}_4 + 2\ \textrm{H}_2\textrm{O} \)
Urči si oxidační čísla prvků. Uvědom si, jestli jde o redoxní reakci. Pokud ano, použij k vyčíslení křížové pravidlo, pokud ne, tak musíš reakce vyčíslit tzv. „by voko“.
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