Ch.20 - Electrochemistry

Brown - Chemistry: The Central Science 15th Edition

Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo

Brown 15th Edition

Ch.20 - Electrochemistry

Problema 26b

Capitolo 20, Problema 26b

Complete and balance the following half-reactions in acidic solution. In each case indicate whether the half-reaction is an oxidation or a reduction. b. H2SO3(𝑎𝑞)⟶SO42−(𝑎𝑞)

Guida verificata passo dopo passo

Identify the oxidation states of sulfur in both H2SO3 and SO4^{2-}.

Determine whether the sulfur is being oxidized or reduced by comparing the oxidation states.

Balance the sulfur atoms on both sides of the equation.

Balance the oxygen atoms by adding H2O molecules to the side that needs more oxygen.

Balance the hydrogen atoms by adding H+ ions to the side that needs more hydrogen.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.

Durata del video:

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Half-Reactions

Half-reactions are equations that show either the oxidation or reduction process of a chemical species. In redox reactions, one species loses electrons (oxidation) while another gains electrons (reduction). Balancing half-reactions is essential for understanding the overall reaction and ensuring that the number of electrons lost equals the number gained.

Video consigliato:

Percorso guidato

01:49

First-Order Half-Life

Oxidation and Reduction

Oxidation refers to the loss of electrons or an increase in oxidation state, while reduction involves the gain of electrons or a decrease in oxidation state. In the given half-reaction, identifying whether H2SO3 is oxidized to SO4^2− requires analyzing the changes in oxidation states of sulfur and oxygen during the reaction.

Video consigliato:

Percorso guidato

01:53

Oxidation and Reduction Reactions

Balancing Redox Reactions in Acidic Solution

When balancing redox reactions in acidic solutions, it is important to add H+ ions and water molecules to balance hydrogen and oxygen atoms, respectively. The process involves ensuring that both mass and charge are conserved, which may require adjusting coefficients and adding electrons to the half-reactions to achieve balance.

Video consigliato:

Percorso guidato

01:46

Balancing Acidic Redox Reactions

Pratica correlata

Domanda del libro di testo

Complete and balance the following equations, and identify the oxidizing and reducing agents:

a. MnO4−(𝑎𝑞)+CH3OH(𝑎𝑞)⟶Mn2+(𝑎𝑞)+HCOOH(𝑎𝑞)(acidic solution)

b. As2O3(𝑠)+NO3−(𝑎𝑞)⟶H3AsO4(𝑎𝑞)+N2O3(𝑎𝑞)(acidic solution)

c. Pb(OH)42−(𝑎𝑞)+ClO−(𝑎𝑞)⟶PbO2(𝑠)+Cl−(𝑎𝑞)(basic solution)

Domanda del libro di testo

Complete and balance the following equations, and identify the oxidizing and reducing agents: (a) Cr₂O₇^2-(aq) + I^-(aq) → Cr³⁺(aq) + IO₃^-(aq) (acidic solution) (b) MnO₄^-(aq) + CH₃O(1aq) → Mn²⁺(aq) + HCOOH(aq) (acidic solution) (c) I₂(s) + OCl^-(aq) → IO₃^-(aq) + Cl^-(aq) (acidic solution)

771

views

Domanda del libro di testo

Complete and balance the following half-reactions in basic solution. In each case, indicate whether the half-reaction is an oxidation or a reduction. c. Cr(OH)3(𝑠)⟶CrO42−(𝑎𝑞)

Domanda del libro di testo

Complete and balance the following equations, and identify the oxidizing and reducing agents: MnO₄^-(aq) + Br^-(aq) → MnO₂(s) + BrO₃^-(aq) (basic solution)

703

views

Domanda del libro di testo

Complete and balance the following half-reactions in basic solution. In each case, indicate whether the half-reaction is an oxidation or a reduction.

a. O2(𝑔)⟶H2O(𝑙)

b. Mn2+(𝑎𝑞)⟶MnO2(𝑠)

c. Cr(OH)3(𝑠)⟶CrO42−(𝑎𝑞)

d. N2H4(𝑎𝑞)⟶N2(𝑔)

Domanda del libro di testo

Complete and balance the following half-reactions. In each case, indicate whether the half-reaction is an oxidation or a reduction. (f) SO32-1aq2 ¡ SO42-1aq2 (basic solution)

620

views