The half-reaction that should occur at the anode during electrolysis of an aqueous potassium bromide solution isGroup of answer choices2Br– → Br2 + 2e–.Na+ + e– → Na.2H2O → O2 + 4H+ + 4e–.Br2 + 2e– → 2Br–.Na → Na+ + e–.
Question
The half-reaction that should occur at the anode during electrolysis of an aqueous potassium bromide solution isGroup of answer choices2Br– → Br2 + 2e–.Na+ + e– → Na.2H2O → O2 + 4H+ + 4e–.Br2 + 2e– → 2Br–.Na → Na+ + e–.
Solution
The half-reaction that should occur at the anode during electrolysis of an aqueous potassium bromide solution is 2Br– → Br2 + 2e–.
Here's why:
-
First, it's important to understand that electrolysis is a process that uses an electric current to drive a non-spontaneous chemical reaction.
-
In the electrolysis of an aqueous potassium bromide solution, the potassium bromide (KBr) is dissolved in water, forming K+ and Br- ions.
-
The anode is the electrode where oxidation occurs. Oxidation is a process that involves the loss of electrons.
-
Looking at the given reactions, the one that involves the bromide ion (Br-) losing electrons (thus being oxidized) is 2Br– → Br2 + 2e–.
-
Therefore, this is the half-reaction that should occur at the anode during the electrolysis of an aqueous potassium bromide solution.
Similar Questions
Which ions are present in an aqueous solution of sodium bromide?Na+, Br–, H+ and OH–H+ and Br– onlyNa+ and Br– onlyNa+ and OH– only2In the electrolysis of aqueous potassium sulfate, what product is formed at the cathode?HydrogenOxygenSulfatePotassium3In the electrolysis of aqueous lithium chloride, what product is formed at the anode?HydrogenOxygenChlorineLithium4In electrolysis, how can you test whether the gas formed at the anode is a halogen?A lit splint produces a squeaky popTurns limewater cloudy whiteRelights a glowing splintBleaches damp blue litmus paper5In the electrolysis of aqueous copper (II) sulfate, what elements are formed at each electrode?Copper at the anode; oxygen at the cathodeCopper at the cathode; oxygen at the anodeHydrogen at the cathode; oxygen at the anodeCopper at the cathode; sulfate at the anode6In the electrolysis of aqueous sodium chloride, which ions will be left behind in the solution?H+ and OH–Na+ and OH–Na+ and Cl–H+ and Cl–
What is produced at the anode in electrolysis of concentrated NaCl solution?
State the name of the ion which is oxidised in the following half equations.Cathode: Na+ + e– → Na Anode: 2Cl– → Cl2 + 2e–
Consider the following reactions:Ca(OH)2 + ‘X’ → ‘Y’ + H2ONaOH + Zn → ‘Z’ + H2↑If ‘X’ is the gas released at anode during the electrolysis of brine, then ‘Y’ and ‘Z’ respectively areOnly one correct answerA.CaCO3 and NaZn(OH)2B.CaOCl2 and Na2ZnO2C.CaSO4 and Na2ZnO2D.CaOCl2 and NaO·ZnO
The half-reaction at the cathode in an electrochemical cell is given below. What other half-reaction would most likely occur at the anode to produce a spontaneous reaction?Zn2+(aq) + 2e- Zn(s)Click for a reduction potential chartA.H2(g) 2H+(aq) + 2e-B.K+(aq) + e- K(s)C.Al(s) Al3+(aq) + 3e-D.Zn(s) Zn2+(aq) + 2e-
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.