Why zinc coating protects iron more effectively than tin coating ?
Given `E_(Zn^(2+)//Zn)^(Theta)= -0.76V`,
`E_(Sn^(2+)//Sn)^(Theta)= -0.14V, E_(Fe^(2+)//Fe)^(Theta)= -0.44V`

An iron wire is immersed in a solution containing ZnSO_(4) and NiSO_(4) . When the concentration of each salt is 1 M, predict giving reactions which of the following reactions is likely to proceed : (i) Iron reduces Zn^(+) ions (ii) Iron reduces Ni^(2+) ions. Given E^(Theta)= -0.76 V " for "Zn^(2+)//Zn E^(Theta)= -0.44 V" for "Fe^(2+)//Fe E^(Theta)= -0.25V " for "Ni^(2+)//Ni

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

Explain the following : Zinc displaces hydrogen from acid solution. E_(Zn^(2+)//Zn)^(Theta)= -0.76V

Can a solution of 1 M ZnSO_(4) be stored in a vessel made of copper ? Given that E_(Zn^(+2)//Zn)^(@) =-0.76V and E_(Cu^(+2)//Cu)^(@)=0.34 V

A solution is 1 molar in each of NaCl, CdCl_(2), ZnCl_(2) and PbCl_(2) . To this Sn metal is added, which of the following is true? Given E^(@) (Pb^(2+)//Pb = -0.126V) E_(Sn^(2+)//Sn)^(@) = -0.136V, E_(Cd^(2+)//Cd)^(@) = -0.40V E_(Zn^(2+)//Zn)^(@) = -0.763V, E_(Na^(+)//Na)^(@)= -2.71V

Calculate the e.m.f. of the cell Zn//Zn^(2+) (0.1M) "||" Cu^(2+) (0.01M) "|"Cu E_(Zn^(2+)//Zn)^(Theta)= -0.76 " V and "E_(Cu^(2+)//Cu)^(Theta)=0.34V

For the following cell, calculate the emf: Al//Al^(3+) (0.01 M)"||" Fe^(2+) (0.02M)"|"Fe Given: E_(Al^(3+)//Al)^(Theta) = -1.66V, E_(Fe^(2+)//Fe)^(Theta)= -0.44V

Calculate the equilibrium constant for the reaction: Cd^(2+) (aq) +Zn(s) hArr Zn^(2+) (aq) +Cd (s) If E_(Cd^(2+)//Cd)^(Theta) = -0.403V E_(Zn^(2+)//Zn)^(Theta) = -0.763 V

A cell is constructed by dipping a zinc rod in 0.1 M zinc nitrate solution and a lead rod in 0.2 M lead nitrate solution. E_(Pb^(2+)//Pb)^(Theta) = -0.13 V and E_(Zn^(2+)//Zn)^(Theta) = -0.76V (i) Write the spontaneous cell reaction. (ii) Calculate standard emf and emf of the cell.

Calculate the maximum electrical work that can be obtained from the following cell under the standard conditions at 25^(@)C . Zn//Zn^(2+) (aq)"||"Fe^(2+)(aq)//Fe Given that E_(Zn^(2+)(aq)//Zn)^(Theta)= -0.76V E^(Theta)Fe^(2+) (aq)//Fe= -0.44 V and F = 96500"C mol"^(-1)