Vyvážení chemické rovnice
Vyčísli následující rovnici:
\( \textrm{Cu} + \textrm{HNO}_3 → \textrm{Cu(NO}_3)_2 + \textrm{NO} + \textrm{H}_2\textrm{O} \)
\( 3\ \textrm{Cu} + 7\ \textrm{HNO}_3 → 3\ \textrm{Cu(NO}_3)_2 + 2\ \textrm{NO}_2 + 4\ \textrm{H}_2\textrm{O} \)
\( 4\ \textrm{Cu} + 10\ \textrm{HNO}_3 → 4\ \textrm{Cu(NO}_3)_2 + 2\ \textrm{NO} + 5\ \textrm{H}_2\textrm{O} \)
\( 2\ \textrm{Cu} + 6\ \textrm{HNO}_3 → 2\ \textrm{Cu(NO}_3)_2 + 3\ \textrm{NO} + 3\ \textrm{H}_2\textrm{O} \)
\( 3\ \textrm{Cu} + 8\ \textrm{HNO}_3 → 3\ \textrm{Cu(NO}_3)_2 + 2\ \textrm{NO} + 4\ \textrm{H}_2\textrm{O} \)
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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