Advertisements
Advertisements
Question
Write balanced chemical equation for the following reactions:
Dichlorine heptaoxide \[\ce{(Cl2O7)}\] in gaseous state combines with an aqueous solution of hydrogen peroxide in acidic medium to give chlorite ion \[\ce{(ClO^{-}2)}\] and oxygen gas. (Balance by ion-electron method)
Solution
\[\ce{Cl2O7 (g) + 4H2O2 (aq) -> 2ClO^{-}2 (aq) + 3H2O (l) + 4O2 (g) + 2H+ (aq)}\]
Balancing by ion-electron method:
Oxidation half: \[\ce{H2O2 -> O2 + 2e-}\]
Adding \[\ce{2H+}\] on right side to balance H atoms and charge.
\[\ce{H2O2 -> O2 + 2H^{+} + 2e-}\]
Reduction half: \[\ce{Cl2O7 + 8e- -> 2ClO^{-}2}\]
Adding \[\ce{H2O}\] and \[\ce{H+}\] to balance \[\ce{H}\] and \[\ce{O}\] atoms
\[\ce{Cl2O7 + 8e- + 6H+ -> 2ClO^{-}2 + 3H2O}\]
Adding oxidation and reduction half
\[\ce{[H2O2 -> O2 + 2e- + 2H+] × 4}\]
\[\ce{Cl2O7 + 8e- + 6H+ -> 2ClO^{-}2 + 3H2O}\]
\[\ce{Cl2O7 + 4H2O2 -> 2ClO^{-}2 + 3H2O + 4O2 + 2H+}\]
APPEARS IN
RELATED QUESTIONS
Calculate the oxidation number of sulphur, chromium and nitrogen in H2SO5, `"Cr"_2"O"_7^(2-)` and `"NO"_3^-`. Suggest structure of these compounds. Count for the fallacy.
How do you count for the following observations?
Though alkaline potassium permanganate and acidic potassium permanganate both are used as oxidants, yet in the manufacture of benzoic acid from toluene we use alcoholic potassium permanganate as an oxidant. Why? Write a balanced redox equation for the reaction.
Balance the following equation in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent.
\[\ce{Cl_2O_{7(g)} + H_2O_{2(aq)} -> ClO-_{2(aq)} + O_{2(g)} + H+_{(aq)}}\]
Balance the following reaction by oxidation number method.
\[\ce{Bi(OH)_{3(s)} + Sn(OH)^-_{3(aq)}->Bi_{(s)} + Sn(OH)^2-_{6(aq)}(basic)}\]
Which of the following is INCORRECT for the following reaction?
\[\ce{2Zn_{(s)} + O2_{(g)} -> 2ZnO_{(s)}}\]
Identify coefficients 'x' and 'y' for the following reaction.
\[\ce{{x}H2O2_{(aq)} + ClO^-_{4(aq)} -> 2O2_{(g)} + ClO^-_{2(aq)} + {y}H2O_{(l)}}\]
Write balanced chemical equation for the following reactions:
Permanganate ion \[\ce{(MnO^{-}4)}\] reacts with sulphur dioxide gas in acidic medium to produce \[\ce{Mn^{2+}}\] and hydrogen sulphate ion.
Balance the following equations by the oxidation number method.
\[\ce{I2 + NO^{-}3 -> NO2 + IO^{-}3}\]
Identify the redox reactions out of the following reactions and identify the oxidising and reducing agents in them.
\[\ce{4NH3 (g) + 3O2 (g) -> 2N2 (g) + 6H2O (g)}\]
Balance the following ionic equations.
\[\ce{Cr2O^{2-}7 + H^{+} + I- -> Cr^{3+} + I2 + H2O}\]
