6. Chemical Quantities & Aqueous Reactions

What is the oxidation state of chromium (Cr) in the compound K2Cr2O7?

In the reaction 16H^+ + 2Cr_2O_7^{2-} + C_2H_5OH → 4Cr^{3+} + 11H_2O + 2CO_2, which element is reduced?

What is the oxidation number of chlorine (Cl) in the compound NaClO3?

What is the oxidation state of an individual carbon atom in CaCO_3?

Which of the following species has the highest oxidizing power based on their oxidation numbers?

What is the oxidation number of aluminum in Al2O3?

What is the oxidation state of manganese (Mn) in the compound Mn(CrO4)2?

Which of the following compounds at 25°C and 1.0 atm contains an element in a +1 oxidation state?

What is the oxidation state of sulfur in the sulfate ion, SO_4^{2-}?

What is the oxidation state of nitrogen in Mg(NO_2)_2?

In which reaction does the oxidation number of oxygen increase (i.e., becomes less negative or more positive)?

What is the oxidation number of hydrogen in NH_3?

What is the typical oxidation number of oxygen in most compounds?

Assign an oxidation number to each atom in the compound K₂CrO₄.

In which one of the following molecules does chlorine have the highest oxidation number?