Calculate the emf of the cell at 298 K Sn_((s))|Sn^(2+)(0.05M)||H_((aq))^(+)(0.02M) |H_(2) 1 atm. Pt Given that E_(sn^(2+)//Sn)^(0)=-0.144V
100 ml of 0.1 M HCl and 100 ml of 0.1 M HOCN are mixed then (K_a= 1.2 xx 10^(-6))
Calculate Delta_(r)G for the reaction at 27^(@)C H_(2)(g)+2Ag^(+)(aq)hArr2Ag(s)+2H^(+)(aq) Given : P_(H2)=0.5 bar, [Ag^(+)]=10^(-5)M, [H^(+)]=10^(-3)M,Delta_(r)G^(@)[Ag^(+)(aq)]=77.1kJ//mol
Calculate the potential of the half-cell containing 0.1 M K_(2)Cr_(2)O_(7(aq)), 0.2M Cr_((aq))^(3+)and 1.0xx10^(-4) M H_((aq))^(+). The half-reaction Cr_(2) O_(7(aq))^(2-)+ 14 H_((aq))^(+)+6e^(-)to 2 Cr_((aq))^(3+)+7H_(2)O_((l)) (E^(0) of Cr_(2)O_(7)^(2-) //Cr^(3+)=1.33V)
What is the reaction quotient , Q for the cell Ni_((s)) | Ni^(2+) (0.190 M) || Cl^(-) (0.40 M) | Pt_((s)) Cl_(2(g)) (1.0 atm)
What is the minimum pH required to prevent the precipitation of Zn^(+2) in a solution that is 0.01 M ZnCl_(2) and saturated with 0.1 M H_(2) S (Given : K_(sp) ZnS = 10^(-21) and Ka_(1) xx Ka_(2) of H_(2)S = 10^(-20) )
