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What does the negative sign in the expre...

What does the negative sign in the expression `E_(Zn^(2+)|Zn)^(@)=-0.76V` mean ?

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It means that Zn has greater tendency to undergo oxidation than hydrogen. When zinc electrode is connected to SHE, Zn is odisied and `H^(+)` is reduced
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Zn(s)+2H^(+)(aq)rarr Zn^(2+)(0.1M)+H_(2)(g,"1 atm") Cell potential of a chemical cell in which the above reaction occurs is +0.28V at 25^(@)C . Write the half-cell reactions and calculate the pH of the hydrogen electrode. Give : E_("Zn^(2+)|Zn)^(@)=-0.76V and E_(2H^(+)|H_(2))^(@)=0.00V .

Zn(s)+2H^(+)(aq)rarr Zn^(2+)(0.1M)+H_(2)(g,"1 atm") Cell potential of a chemical cell in which the above reaction occurs is +0.28V at 25^(@)C . Write the half-cell reactions and calculate the pH of the hydrogen electrode. Give : E_("Zn^(2+)||Zn)^(@)=-0.76V and E_(2H^(+)||H)^(@)=0.00V

A Zn - electrode is dipped in a 0.1 (M) ZnSO_(4) solution. The salt in 95% dissociated in solution. Find the reduction potential of the electrode. Given : Temperature =298K, E_(Zn^(2+)|Zn)^(@)=-0.76V

A half - cell is constructed by dipping a Zn- rod into a solution of ZnSO_(4) at 25^(@)C . If the concentration of Zn^(2+) ion in the solution be 0.01 (M), calculate the oxidation potential of the half- cell, Given : E_(Zn^(2+)|Zn)^(@)=-0.76V .

Of the elements Zn , Mg Cu and Ag , which are able to produce H_(2) gas when they are treated with dilute HCl solutions ? [ Given E_(Zn^(2+)|Zn)^(@)= -0.76 V , E_(Mg^(2+)|Mg)^(@) = - 1.20 V, E_(Cu^(2)+|Cu)^(@)+0.34 V and E_(Ag^(+)|Ag)^(@) = + 0.80 V ]

Determine the EMF of a decimolar Daniell cell at 25^(@)C . Given : E_(Zn^(2+)|Zn)^(@)=-0.76V and E_(Cu^(2+)|Cu)^(@)=+0.34V .

Calculate the value of equilibrium constant of the reaction occurring in Deniell cell at 25^(@)C . Given : E_(Zn^(2+)|Zn)^(@)=-0.76V and E_(Cu^(2+)|Cu)^(@)=+0.34V

Which among the following vessels is used to store CuSO_(4) solution ? a Zn vessel [ Given E_(Zn^(2+)|Zn)^(@)=-0.76V, E_(Cu^(2+)|Cu)^(@)=+0.34V and E_(Ag^(+)|Ag)^(0)=0.80V ]

Which among the following vessels is used to store CuSO_(4) solution ? a Ag vessel [ Given E_(Zn^(2+)|Zn)^(0)=-0.76V, E_(Cu^(2+)|Cu)^(0)=+0.34V and E_(Ag^(+)|Ag)^(0)=0.80V ]

CHHAYA PUBLICATION-ELECTROCHEMISTRY-SOLVED NCERT EXEMPLAR PROBLEMS (Short Answer Type)
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  2. Under what condition is E("cell")=0 or Delta(r)G=0?

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  3. What does the negative sign in the expression E(Zn^(2+)|Zn)^(@)=-0.76V...

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  7. What is electrode potential ?

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  9. Why is alternating current used for measuring resistance of an electro...

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  10. A galvanic cell has electrical potential of 1.1 V. If an opposing pote...

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  11. How will the pH of brine (aq. NaCl solution) be affected when it is el...

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  13. Solutions of two electrolytes 'A' and 'B' are diluted. The Lambda(m) o...

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  14. When acidulated water (dil. H(2) SO(4) solution) is electrolysed, will...

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  15. In an aqueous solution how does specific conductivity of electrolytes ...

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  17. Consider the following galvanic cell given below- Cu|Cu^(2+)||Cl^(-...

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  18. Write the Nernst equation for the cell reaction in the Daniel cell. Ho...

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