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Questions and Answers
What is the oxidation state change of sulfur in the half-reaction from SO32- to SO42-?
What is the oxidation state change of sulfur in the half-reaction from SO32- to SO42-?
- From +2 to +4
- From +4 to +5
- From +6 to +4
- From +4 to +6 (correct)
Which step is necessary when balancing the oxidation half-reaction involving SO32-?
Which step is necessary when balancing the oxidation half-reaction involving SO32-?
- Including additional sulfates to balance charges
- Adding electrons to the product side
- Balancing all elements except hydrogen and oxygen first (correct)
- Using H+ ions to balance electrons
When balancing the half-reaction for SO32- in basic conditions, what must be done after adding H+ ions?
When balancing the half-reaction for SO32- in basic conditions, what must be done after adding H+ ions?
- Add an equal number of OH- ions (correct)
- Add an equal number of water molecules
- Substitute H+ with H2O
- Remove water from both sides
Which of the following best describes the electron transfer in the reaction between MnO4- and SO32-?
Which of the following best describes the electron transfer in the reaction between MnO4- and SO32-?
What is the correct product in the balanced reduction half-reaction of MnO4-?
What is the correct product in the balanced reduction half-reaction of MnO4-?
What is the first step in balancing an oxidation half-reaction?
What is the first step in balancing an oxidation half-reaction?
In balancing the oxidation half-reaction of C2H5OH to CO2, how many moles of water are added to balance the oxygen atoms?
In balancing the oxidation half-reaction of C2H5OH to CO2, how many moles of water are added to balance the oxygen atoms?
When balancing the half-reaction, what is the last step to achieve balance in charge?
When balancing the half-reaction, what is the last step to achieve balance in charge?
Which component helps balance the hydrogens in the oxidation half-reaction?
Which component helps balance the hydrogens in the oxidation half-reaction?
What is the state of charge on the left side of the oxidation half-reaction before balancing?
What is the state of charge on the left side of the oxidation half-reaction before balancing?
In the reduction half-reaction of Cr2O72- to Cr3+, how many chromium ions are produced?
In the reduction half-reaction of Cr2O72- to Cr3+, how many chromium ions are produced?
What is the oxidation state of chromium in Cr2O72-?
What is the oxidation state of chromium in Cr2O72-?
How is the reaction verified after balancing the oxidation half-reaction?
How is the reaction verified after balancing the oxidation half-reaction?
What is the purpose of adding H+ to the reduction half-reaction?
What is the purpose of adding H+ to the reduction half-reaction?
Which statement correctly describes the charge balance in the oxidation half-reaction?
Which statement correctly describes the charge balance in the oxidation half-reaction?
How many electrons are produced in the oxidation half-reaction?
How many electrons are produced in the oxidation half-reaction?
What must be true about the number of electrons in the oxidation and reduction half-reactions?
What must be true about the number of electrons in the oxidation and reduction half-reactions?
After equalizing the number of electrons, how is the reduction half-reaction modified?
After equalizing the number of electrons, how is the reduction half-reaction modified?
What is the final overall charge after combining the balanced half-reactions?
What is the final overall charge after combining the balanced half-reactions?
Which component primarily affects the balancing of hydrogen in acidic reactions?
Which component primarily affects the balancing of hydrogen in acidic reactions?
When balancing the half-reaction, how do you verify the equality of atoms and charge?
When balancing the half-reaction, how do you verify the equality of atoms and charge?
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