chemistry-class-12-unit-03-chapter-06-electro-chemistry-l-6-6-rzxsgydqwx8

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Electrochemistry Lecture-6</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Fuel cell equation</B></primary></p>
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<p>Alkaline electrolyte is used in modern cells</p>
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<p><strong>Anode reaction:</strong> $H_2(g)+2OH^- \rarr 2H_2O+2e^- , E\degree=0$V</p>
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<p><strong>Cathode reaction:</strong> $\frac{1}{2}O_2(g)+2H_2O+2e^- \rarr 2OH^- ,E\degree=+1.23$V</p>
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<p><strong>Net reaction:</strong> $H_2(g)+\frac{1}{2}O_2(g)=H_2O \hspace{3 mm} E\degree=1.23$V</p>
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<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-03-chapter-06-electro-chemistry-l-6_6-rzxsgydqwx8-02.jpg"></p>
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<footer style="font-size:18px;"> Electrochemistry $\rightarrow$ Fuel Cell $\rightarrow$ <span style="color:blue">Fuel cell equation</span> $\rightarrow$ Corrosion </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Electrochemistry Lecture-6</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Fuel cell equation</B></primary></p>
<hr>
<main>
<div style='float: left; width:60%;font-size:22px;text-align:left'>
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<p><strong>Anode:</strong>$2H_2\rarr 4H^+ +4e^-$</p>
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<p><strong>Cathode:</strong>$4H^+ +O_2+4e^- \rarr H_2O$ Kinetically slow</p>
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<p>Theoretically ~1.23V at 298K</p>
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<p>Open circuit ~1V</p>
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<p>Load ~0.5-0.8V</p>
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<img src ="https://imagedelivery.net/YfdZ0yYuJi8R0IouXWrMsA/e9d61388-95af-48b8-bd34-cc2bd6274e00/public" style='width:100%;'>

</div>
</main>
<hr>
<footer style="font-size:18px;"> Electrochemistry $\rightarrow$ Fuel Cell $\rightarrow$ <span style="color:blue">Fuel cell equation</span> $\rightarrow$ Corrosion </footer>

<p><Success style="float:center;text-align:center;font-size:28px;"> <B>Electrochemistry Lecture-6</B></Success></p>
<p><primary style="float:center;text-align:center;font-size:24px;"> <B>Corrosion</B></primary></p>
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<p>$M\rarr M^+ +e^-$ (Facilitated by the presence of suitable e-acceptor)depolarisers</p>
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<p>A thin film of moisture (adsorbed) can be very dangerous</p>
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<p>$\rArr$ Corrosion system/system where corrosion takes can be regarded as short-circuited
electrochem cell in which the anodic reation could be</p>
<p>$M\rarr M^{2+}(aq)+2e^-$</p>
<p>$Fe\rarr Fe^{2+}(aq)+2e^-$</p>
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<div style='float: right; width:0%;'>
<p><img alt="image" src="/subject-images/iitpal/image/chemistry-class-12-unit-03-chapter-06-electro-chemistry-l-6_6-rzxsgydqwx8-03.jpg"></p>
</div>
</main>
<hr>
<footer style="font-size:18px;"> Electrochemistry $\rightarrow$ Fuel Cell $\rightarrow$ Fuel cell equation $\rightarrow$ <span style="color:blue">Corrosion</span> </footer>