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3.

,

Ag/AgCl

,, ,

3.2.1

,,

; ; ,

: : ,0.05m10m

/,

: , : ,;;

3.2.2 1. ,, -

Zn2Zn2,,,Zn2

E ,

2

Nernst

E R- ,8.314J/molK F- ,96487T- n- C- mol/LK- - C=1 mol/L,

lmol/L,3.2 KT

3.2 25

3.,-

NaClE,R

K1 K2E,,R, K3EE,

,NaCl E,,:

,,,OH-

,H+

,E

,,

:

3.2.3

,/,, Ag,Pt, ,

/, Ag/AgC1

(Maxwell)

E

2.Ag/AgCl

Cl-:

,

,,:

,

Ag/AgC1 ,Ag/AgCl Ag/AgCl

3.Ag/AgCl:

AgC1 1.5V,R 5mA/cm2

Ag/AgCl,,,,400,Ag/AgCl,,

Ag/AgCl Ag/AgClAgCl,AgCl AgCl,AgCl,

Ag/AgCl

() Ag/AgCl, 10-9A Ag/AgCl

3.2.4.

C,E R1,R2

,1 /C R1 , R2 , 1 /C R1 R1 + R2

AgCl AgCl,

3.2.5

(a)

(b)

(c)

1.560.950.63 cm3,,0.lHz1KHz,

,,, ,

2500pF-5000pF,, ,,0.05Hz5000pF,600M

, 0.05m- 10m :

Rfa,CaE(t) Ea Eb,Cd,C = Cd

,

, 1m 3mol/l KCl,Ag/AgCl

Rt C=Cd

E(t)EaEb:Ej:Et:

C

d1 =1.5m d2 =1.0m L= 3mm = 2.0cm = 1.82 0 = 8.8510-12 F/m

10KHzC

: Rt(50M)

: C WCf

K,

K'W CfC

Cf

K

CCCf a) b) :(c)

a) (b) (c)

1)+ 2 3 Nernst 45) 6) Ag/AgCl

3.1 3.2 3.3 ? 3.4 Ag/AgClAg/AgCl