Chemistry . Redox reactions

Find oxidation states of sulfur in hydrosulfuric acid H2S

• -3

• -1

• -2

• +2

Oxidation state of nitrogen in lithium nitrite Li3N

• +3

• +5

• -3

• -2

Indicate the oxidation number of phosphorus in each of the following compounds:

HPO3

• +5

• -5

• +3

• -1

• +1

Indicate the oxidation number of phosphorus in each of the following compounds:

H3PO2

• -1

• +1

• +2

• +4

• +3

Give the oxidation numbers of all the elements in the following molecules and ions:

ClO2

• +4, -2

• -3,-2

• -2,+2

• -4,-3

Give the oxidation numbers of all the elements in the following molecules and ions: K2CrO4

• +1,+7,-2

• -1,-7,+2

• +1,+7,+2

• -2,+2,-7