Balancing Redox Reactions: Half Reaction Method Explained

In a neutral solution, how many electrons are needed to balance the half-reaction where aluminum becomes Al+3?

• Two electrons

• Three electrons

• Four electrons

• Six electrons

What is the purpose of the half-reaction method in redox reactions?

• To ensure only the reactants are balanced

• To identify the type of reaction

• To balance both atoms and charges in the reaction

• To change the reaction conditions

What is the least common multiple of electrons needed to balance the half-reactions in a neutral solution example?

• Nine

• Six

• Three

• Two

Under acidic conditions, what additional substances are used to balance redox reactions?

• Sulfate ions

• Nitrate ions

• Hydroxide ions

• Water and H+ ions

How many electrons are added to the left side in the acidic condition example involving bromate and zinc?

• Two electrons

• Four electrons

• Six electrons

• Eight electrons

What is the final charge balance on both sides of the equation in the acidic example?

• Negative five

• Zero

• Positive five

• Negative one

In basic conditions, what is added to both sides to neutralize H+ ions?

• Sulfate ions

• Water molecules

• Electrons

• Hydroxide ions

How many water molecules are subtracted from both sides in the basic condition example?

• Two

• Four

• Eight

• Six

What is the total number of hydroxide ions on the right side after simplifying the equation in basic conditions?

• Twenty-four

• Twelve

• Eight

• Four

How many electrons are needed to balance the charges in the basic condition example involving perchlorate and chloride?

• Three

• Eight

• Six

• Twelve