In the given reaction,calculate the number of electrons lost by iron:
$3Fe + 4H_2O \to Fe_3O_4 + 4H_2$
$3Fe + 4H_2O \to Fe_3O_4 + 4H_2$
(8) The balanced chemical equation is: $3Fe + 4H_2O \to Fe_3O_4 + 4H_2$
In the reactant side,the oxidation state of $Fe$ is $0$.
In the product side,$Fe_3O_4$ is a mixed oxide of $FeO$ and $Fe_2O_3$. The oxidation state of $Fe$ in $Fe_3O_4$ is calculated as: $3x + 4(-2) = 0 \implies 3x = 8 \implies x = +8/3$.
Total change in oxidation state for $3$ atoms of $Fe$ is: $3 \times (+8/3 - 0) = 8$.
Therefore,the number of electrons lost by iron is $8$.
In the reactant side,the oxidation state of $Fe$ is $0$.
In the product side,$Fe_3O_4$ is a mixed oxide of $FeO$ and $Fe_2O_3$. The oxidation state of $Fe$ in $Fe_3O_4$ is calculated as: $3x + 4(-2) = 0 \implies 3x = 8 \implies x = +8/3$.
Total change in oxidation state for $3$ atoms of $Fe$ is: $3 \times (+8/3 - 0) = 8$.
Therefore,the number of electrons lost by iron is $8$.
Explore More
Similar Questions
Assign $A, B, C, D$ from the given type of reaction:
$5CO(g) + I_2O_5(s) \longrightarrow 5CO_2(g) + I_2(s)$
$5CO(g) + I_2O_5(s) \longrightarrow 5CO_2(g) + I_2(s)$
Medium
View SolutionHow many electrons are involved in the following redox reaction?
$Cr_2O_7^{2-} + Fe^{2+} + C_2O_4^{2-} \to Cr^{3+} + Fe^{3+} + CO_2$ (Unbalanced)
$Cr_2O_7^{2-} + Fe^{2+} + C_2O_4^{2-} \to Cr^{3+} + Fe^{3+} + CO_2$ (Unbalanced)
DifficultJEE MAIN 2014
View SolutionFor the reaction: $KClO_3 + 6FeSO_4 + 3H_2SO_4 \to KCl + 3Fe_2(SO_4)_3 + 3H_2O$. Which of the following statements is true $(T)$ or false $(F)$ regarding the nature of the reaction? The reaction is complex.
Easy
View SolutionWhen thiosulphate ion is oxidised by iodine,which one of the following ions is produced?
MediumAIPMT 1996
View SolutionAssign $A, B, C, D$ from the given type of reaction.
$H_3PO_2 + AgNO_3 \longrightarrow Ag + H_3PO_4 + HNO_3$ (Note: The reaction is balanced as $H_3PO_2 + 4AgNO_3 + 2H_2O \longrightarrow 4Ag + H_3PO_4 + 4HNO_3$)
$H_3PO_2 + AgNO_3 \longrightarrow Ag + H_3PO_4 + HNO_3$ (Note: The reaction is balanced as $H_3PO_2 + 4AgNO_3 + 2H_2O \longrightarrow 4Ag + H_3PO_4 + 4HNO_3$)
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo