REDOX reactions

• What does the term "redox" stand for?

  Reduction and oxidation
• What does the "oil" in "oil rig" represent?

  Oxidation is loss of electrons
• What does the "rig" in "oil rig" represent?

  Reduction is gain of electrons
• What is oxidation in terms of electrons?

  Loss of electrons
• What is reduction in terms of electrons?

  Gain of electrons
• What are oxidation states or oxidation numbers?

  Numbers indicating electrons gained or lost
• What is the oxidation state of Group 1 metals?

  Plus 1
• What is the oxidation state of uncombined elements?

  Zero
• What is the oxidation state of Group 2 metals?

  Plus 2
• What is the oxidation state of aluminium?

  Plus 3
• What is the oxidation state of fluorine?

  Minus 1
• What is the oxidation state of the rest of Group 7 elements?

  Minus 1
• What is the exception for Group 7 elements' oxidation state?

  When bonded with fluorine
• What is the oxidation state of hydrogen?

  Plus 1
• What is the exception for hydrogen's oxidation state?

  In metal hydrides
• What is the oxidation state of oxygen?

  Minus 2
• What is the exception for oxygen's oxidation state?

  In hydrogen peroxide
• What does the Roman numeral in iron(II) indicate?

  Oxidation state of iron
• How do you determine the oxidation state in hydrogen chloride?

  Hydrogen is plus 1, chlorine is minus 1
• How do you find the oxidation state of sulfur in sulfuric acid?

  Plus 6
• What is the oxidation state of nitrogen in potassium nitrate?

  Plus 5
• What is the oxidation state of manganese in manganese oxide?

  Plus 7
• How do you determine the oxidation state of chromium in potassium dichromate?

  Plus 6
• What is the oxidation state of nitrogen in ammonium ion?

  Minus 3
• What happens to oxidation states in redox reactions?

  They change during oxidation and reduction
• What is a half equation?

  Shows only oxidation or reduction
• What is a redox equation?

  Includes both oxidation and reduction
• What is the oxidation process of iron(II) to iron(III)?

  Iron(II) loses an electron
• What is oxidation defined as?

  Loss of electrons
• How do you balance the half equation for iron oxidation?

  Add an electron to the product side
• What is reduction defined as?

  Gain of electrons
• How do you balance the dichromate reduction reaction?

  Add water to balance oxygens
• Why do oxidation and reduction occur simultaneously?

  One species loses electrons while another gains
• What acronym helps remember the redox rule?

  OILRIG
• What is an oxidizing agent?

  Oxidizes something and is reduced
• What does oxidation number indicate?

  Oxidation state of an element or ionic substance
• What is a reducing agent?

  Reduces something and is oxidized
• What is the oxidation state of an element?

  Zero
• What do oxidation states in a neutral compound add up to?

  Zero
• How do oxidizing and reducing agents interact in a reaction?

  One oxidizes while the other reduces