If we balanced the following reaction, what is the net ionic charge on the right side of the equation? H+ + MnO4- + Fe2+ →Mn2+ + Fe3+ + H2O
Correct answer: D. +17
- A. +5
- B. +7
- C. +10
- D. +17
Explanation
To solve this problem, we must balance the redox reaction by ensuring that both mass and charge are conserved. Manganese is reduced from +7 in MnO4- to +2 in Mn2+, gaining 5 electrons. Iron is oxidized from +2 in Fe2+ to +3 in Fe3+, losing 1 electron per iron atom. By balancing the electron transfer, we multiply the iron half-equation by 5, resulting in the balanced equation:8H+ + MnO4- + 5Fe2+ → Mn2+ + 5Fe3+ + 4H2OOn the right side, the charges are:Mn2+: +25Fe3+: +15 (5 x +3)H2O: NeutralTotal charge on the right: +2 + 15 = +17Thus, the correct net ionic charge on the right side is +17. Other options are incorrect as they do not reflect the correct balance of charges based on the stoichiometry of the reaction.
Last updated
About Balancing Redox Equations
Redox equations are balanced by tracking electron loss and gain through oxidation numbers or the ion-electron method. Work includes identifying oxidizing and reducing agents, balancing atoms and charge in acidic or basic medium, and ensuring that electrons lost equal electrons gained.
Practise Electrochemistry
696 free Electrochemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Consider the following redox reaction. Zn+dil HNO3? Zn (NO3)2 + N2O + H2O The coefficient number of HNO3 in the equation is__________________?
In acidic medium, ____ is used to balance oxygen atoms in an ionic equation.
In balancing a redox equation in acidic medium, oxygen atoms are balanced by adding
In ion electron method of balancing, equations are:
Number of electrons added on both sides of oxidation and reduction half reactions are balanced _.