Advertisements
Advertisements
Question
Write the reaction occurring at anode and cathode and the products of electrolysis of aq KCl.
Solution
\[\ce{KCl (aq) -> K+(aq) + Cl-(aq)}\]
Cathode: \[\ce{H2O(l) + e- -> 1/2 H2(g) + OH-(aq)}\]
Anode: \[\ce{Cl-(aq) -> 1/2Cl2(aq) + e-}\]
Net reaction: \[\ce{KCl(aq) + H2O(l) -> K+(aq) + OH-(aq) + 1/2H2(g) + 1/2Cl2(g)}\]
APPEARS IN
RELATED QUESTIONS
Predict the product of electrolysis in the following:
An aqueous solution of \[\ce{AgNO3}\] with silver electrodes.
Predict the product of electrolysis in the following:
An aqueous solution of \[\ce{AgNO3}\] with platinum electrodes.
Predict the product of electrolysis in the following:
An aqueous solution of \[\ce{CuCl2}\] with platinum electrodes.
How much electricity is required in coulomb for the oxidation of 1 mol of \[\ce{H2O}\] to \[\ce{O2}\]?
How much electricity is required in coulomb for the oxidation of 1 mol of \[\ce{FeO}\] to \[\ce{Fe2O3}\]?
Using the standard electrode potentials, predict if the reaction between the following is feasible:
\[\ce{Fe^{3+}_{( aq)}}\] and \[\ce{I^-_{( aq)}}\]
Using the standard electrode potentials, predict if the reaction between the following is feasible:
\[\ce{Fe^{3+}_{( aq)}}\] and \[\ce{Br^-_{( aq)}}\]
Using the standard electrode potentials, predict if the reaction between the following is feasible:
\[\ce{Br2_{(aq)}}\] and \[\ce{Fe^{2+}_{( aq)}}\]
In the following reaction, identify X:
\[\ce{Cr2O^{2-}7 + X ->[H+] Cr^{3+} + H2O + Oxidized product of X}\]
Four half-reactions, I to IV are shown below:
- \[\ce{2Cl^- -> Cl2 + 2e^-}\]
- \[\ce{4OH^- -> O2 + 2H2O + 2e^-}\]
- \[\ce{Na^+ + e^- -> Na}\]
- \[\ce{2H^+ + 2e^- -> H2}\]
Which two of these reactions are most likely to occur when concentrated brine is electrolysed?
