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Lesson Worksheet: Oxidation Numbers Chemistry

In this worksheet, we will practice calculating and using oxidation numbers.

Q1:

Give the oxidation state of chlorine in ClO.

Q2:

What is the sum of the oxidation numbers of sulfur in the following chemical species: S,HS,SO,SO8223, and S2?

Q3:

What is the oxidation number of oxygen in hydrogen peroxide?

Q4:

The oxidation numbers of the atoms in an ionic unit of magnesium chloride add up to 0.

What is the oxidation number of magnesium in MgCl2?

What is the oxidation number of chlorine in MgCl2?

Q5:

What is the oxidation number of hydrogen in HO2?

Q6:

The oxidation numbers of the atoms in a molecule of carbon dioxide add up to 0.

What is the oxidation number of oxygen in CO2?

What is the oxidation number of carbon in CO2?

Q7:

What is the oxidation number of sulfur in SO24?

Q8:

What is the oxidation number of oxygen in O2?

Q9:

Consider the following equation: CuO+HCu+HO22 Which of the following species acts as an oxidising agent in this equation?

  • ACuO
  • BHO2
  • CH2
  • DCu

Q10:

Which of the following represents an oxidation–reduction reaction?

  • ANaOH+HClNaCl+HO2
  • BFeS+2HClHS+FeCl22
  • C2FeCl+HS2FeCl+2HCl+S322
  • DMgO+HSOMgSO+HO2442

This lesson includes 18 additional questions and 23 additional question variations for subscribers.

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