Equinormal solution of two weak acids , HA(pKa= 3) and HB (pKb = 5) are each placed in contact with standard hydrogen electrode at 25oC. When a cell is construsted by interconnecting them through a salt bridge , find the emf of the cell.

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Q. Equinormal solution of two weak acids,

H A (p K_{a} = 3)

and

H B (p K_{a} = 5)

are each placed in contact with standard hydrogen electrode at

25^{\circ} C

. When a cell is constructed by interconnecting them through a salt bridge, find the e.m.f of the cell.

Two weak acid solutions $H A_{1}$ and $H A_{2}$ each with the same concentration and having pKa values 3 and 5 are placed in contact with hydrogen electrode ( 1 atm, 25 $^{0}$ C ) and are interconnected through a salt bridge. Find emf of the cell.

Q. A cell contains two hydrogen electrode. The negative electrode is in contact with a solution of

10^{- 6} M

hydrogen ions. the EMF of the cell is

0.118 V

25^{o} C

. If the concentration of hydrogen ions at the positive electrode is

x \times 10^{- 5} M

, then the value of

x

Q. A cell contains two hydrogen electrode. The negative electrode is in contact with a solution of

10^{- 6} M

hydrogen ions. The emf of the cell is

0.118

volt at

25^{\circ} C

. Calculate the concentration of hydrogen ions at the positive electrode.

Q. A cell contains two hydrogen electrodes. The negative electrode is in contact with a solution of

10^{- 6}

M hydrogen ions. The

E M F

of the cell is

0.118 V

25^{\circ} C

. The concentration of hydrogen ions at the positive electrode is:

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