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  3. Chemistry
  4. For Daniell cell, Zn(.s.)+Cu2 +(.aq.)leftharpoons Cu(.s.)+Zn2 +(.aq.) The reaction quotient Q is given by Q=([. Z n2 + ]./[. C u2 + ].) <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-wwkj7di1hh59.png /> OA = 1.10 volt Where Ec e l l=1.1591 volt, then

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Q. For Daniell cell,

$Zn\left(\right.s\left.\right)+Cu^{2 +}\left(\right.aq\left.\right)\rightleftharpoons Cu\left(\right.s\left.\right)+Zn^{2 +}\left(\right.aq\left.\right)$

The reaction quotient Q is given by

$Q=\frac{\left[\right. Z n^{2 +} \left]\right.}{\left[\right. C u^{2 +} \left]\right.}$

Question

OA = 1.10 volt

Where $E_{c e l l}=1.1591$ volt, then

NTA AbhyasNTA Abhyas 2020Electrochemistry

Solution:

$E=E^\circ -\frac{0.059}{n}log_{10}Q$

For Daniell cell, $E^\circ =1.10$ V (equal to OA)

$E=1.10-\frac{0.059}{2}log0.01$

$=+1.159$ V