Redox Reactions and Oxidation Numbers

This video tutorial covers single displacement reactions, the activity series, and basic redox reactions. It explains how a single element can replace another in a compound if it is more reactive, using the activity series to predict such reactions. The tutorial also delves into redox reactions, highlighting the concepts of reduction and oxidation, and the law of conservation of charge. It introduces the terms reducing and oxidizing agents, explaining their roles in redox processes. Finally, the video discusses oxidation numbers, providing examples to illustrate how they track electrons in reactions.

What determines if a single displacement reaction will occur?

• The size of the compound

• The temperature of the reaction

• The reactivity of the single element compared to the compound

• The color of the elements involved

In a redox reaction, what happens to electrons during reduction?

• They are gained

• They are lost

• They remain unchanged

• They are shared equally

What is the mnemonic used to remember electron transfer in redox reactions?

• OIL RIG

• LEO GER

• G where

• REDOX

What does the law of conservation of charge ensure in a redox reaction?

• The charge is balanced on both sides

• The mass is conserved

• The temperature remains constant

• The energy is conserved

Which term describes a substance that allows another to be oxidized?

• Inhibitor

• Catalyst

• Oxidizing agent

• Reducing agent

If a substance is being reduced, what role does it play in the reaction?

• Catalyst

• Neutral agent

• Reducing agent

• Oxidizing agent

What is the oxidation number of an element in its elemental form?

• +1

• 0

• +2

• -1

What is the oxidation number of calcium in calcium chloride?

• +1

• +2

• 0

• -1

How do you determine the oxidation number of an ion in an ionic compound?

• By its color

• By its ionic charge

• By its position in the periodic table

• By its size

What is the oxidation number of magnesium in magnesium oxide?

• -2

• 0

• +2

• +1