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BO CO TH NGHIM

TNG TR

Ngy th nghim: 20/4/200H! " t#n: Ng$y%n T&$ng Hi'$

I( C) * +, TH-.T

Nghin cu nhng p ng ca in cc nghin cu khi p t ln n

mt in th xoay chiu bin nh c t!n "# thay $i t%ong ph&m 'i %ng

()** *** +, - *.**)/ +, t&i in th 0n m1n234in th xoay chiu5 6(t2 7 6o3 "in (t2

Trong : l8 t!n "# gc 7 933:

: l8 t!n "# gc. +,

;1ng in xoay chiu5 p kp. coi nhE mt tO in PC

M ?$ng t%Q ca Gu t%Hnh Ra%aCay. S:

M 4in t%Q chEa EFc bT U. l8 in t%Q Cung CDch gia in cc "o

"nh '8 in cc nghin cu3?$ng t%Q Ra%aCay S:thEVng EFc phWn th8nh 9 cch tEKng EKng5

XhWn th8nh mt in t%Q U" mYc n#i tip '>i mt giL in Cung P"

XhWn th8nh in t%Q chuyIn in t@ch Uct'8 tZng t%Q khuch tn S[3

Nu h th#ng in ho thoL m\n "K J UanCl]" thH t$ng t%Q ca n tEKng

EKng nhE "au5

)

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2/8

Hnh 1 S tng ng ca bnh in phn.

Biu din tng tr trn !t ph"ng ph#c $% th& '()ui*t+

?$ng t%Q ca Gu t%Hnh in cc5 S(2 7 6(t2 B

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3/8

S^U(2 7 U= Uct- S^^U(2 M 9393PC

4Wy l8 phEKng t%Hnh EVng thng '8 c thI ngo&i "uy n cYt S^U(2 t&i

gi t%D (U= UctM93 93 PC23 4EVng thng n8y ng '>i kh#ng ch khuch tn

'8 t$ng t%Q ea%bu%g '>i gc pha /3hi :

Q 'Tng t!n cao phLn ng chj bD kh#ng ch ng hc '8 Uct S

S^U(2 7 U=` UctB )= 93PC93Uct9

S^ U(2 7 M 3PC3Uct9 B )= 93PC93Uct9

;o . ta c5 `S^U(2 M UM UctB 9 9= S^^U(2 97 UctB99

4 l8 biIu thc ca '1ng t%1n bn k@nh (UctB92. cYt t%Oc S^U(2 t&i U khi

'8 t&i (Uct= U2 khi *3

*1 3 i5$ 6i%n t7ng t&8 9h; nh< tn h=nh 2 6i ?y5

1ng t%1n lin tip xuAt hin3 hi c " hAp thO thH c1n thAy c na '1ng

t%1n Q ph@a CE>i t%Oc S^ khi *3

Ngo8i cch biIu Cin t%n mt phng phc. t$ng t%Q c1n EFc biIu Cin

bdng cc EVng foC]3 4 l8 cc EVng biIu Cin m#i Guan h g Sth]o

q

- Z''

Z'

Khong che dong hoc Khong che khuech tan. .

RctCdmax=

1

R RctRct

2+R +

R Rct+ - 2 2Cd

R.

Hnh , S biu din tng tr trn !t ph"ng ph#c

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4/8

lg:hoc lg th]o lg :3 ?&i cc min t!n "# cao. cc ph!n Lo ca S bin mAt

'8 chj c1n U3 r t!n "# %At thAp. chj c1n U= Uct3

II( TIN H@NH TH NGHIM

A( Ch$n th nghimD( Th nghim E t7ng t&8 ;FD th9 t&Eng Dit hJng ;K " ;K ;hLt ; ;h':

Phusn bD in cc nghin cu5 cYt mu thp c k@ch thE>c )*x)x*.*/

cm3

M ?sy C!u m cho thp bdng x8 ph1ng

M Ua "&ch bdng nE>c

M 4nh "&ch bdng giAy %p tv khZ n tinhM Ua "&ch '8 t%ng bdng nE>c cAt

M ?sy nhw bdng +9/M)*z

M Ua "&ch bdng nE>c '8 t%ng nE>c cAt

;ung CDch nghin cu5 axit +9*./{ khZng c '8 c chAt c ch

u%oth%ophin |gBl3

(Th nghim E t7ng t&8 ;FD mng 1n t&Eng 6$ng 6;h NDC PQ:M 4in cc nghin cu5 thp ph "Kn EFc gi>i h&n Cin t@ch bdng #ng

nha hHnh t%O3

M ;ung CDch nghin cu5 NaPl q./z

Phusn bD bHnh in ha5 c#c thy tinh gJm q in cc5

M 4in cc nghin cu (nhE t%n2

M 4in cc "o "nh5 P}

M 4in cc phO5 lE>i Xt

2( Ti'n hnh th nghim:

{Yc in cc th]o "K J h q in cc

/ q

9

)

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5/8

1) in cc nghin cu

2) in cc ph

3) in cc so snh

4) Bnh o

5) Galvanostat / ot!ntiostat c "#t n$i %& t'nh

4t cc thZng "# !u '8o5 khoLng t!n "# (/*** +, n *.*/+,2~ bin

th ()*m Guanh in th m&ch hQ2~ ;in t@ch mu ()cm923

4o ph$ t$ng t%Q nhV ph!n mm am%y ca {3

III( T S- U@ NHVN WXT

A( T7ng t&8 ;FD th9 t&Eng Dit H2*O4hJng ;K " ;K ;hLt ; ;h'

$&Eth&E9in

{u thp EFc ngWm '8o Cung CDch axit '8 o ngay "au khi ngWm3 t

GuL EFc Ea %a Q J thD hHnh q3

Hnh - .ng tr ca th/p tr0ng ait H,S234567 8h9ng c: ;< c: ch=t #c ch>

/

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Xh$ NyGui"t ca thp t%ong Cung CDch axit +9c '8 khZng c c ch

u c C&ng ) cung t%1n '8 ph!n t!n "# thAp c thAy " hAp phO (c ph$ Guay

ngEFc l&i ' ph@a t!n "# cao23

?v ph$ NyGui"t '8 t@nh chAt ca h R]B+ 9. c thI xWy Cng mZ hHnh

tEKng EKng ca h nhE "au5

Hnh 3 S tng ng ca in c?c *@t tr0ng ait H,S23

Trong : (: in tr) *ung *+ch

(: in tr) ph,n cc

-l": in *ung lp "p

hAp phO t%ong 9 Cung CDch n8y khc nhau3

?%ong Cung CDch axit +9c " hAp phO +9- kh@ "inh %a Q catot khi

thp bD h1a tan t%ong Cung CDch axit \ hAp phO t%n b mt thp3

?%ong Cung CDch axit +9c chAt c ch c hAp phO mt ph!n kh@ + 9

"inh %a Q catot khi thp bD h1a tan '8 mt ph!n l8 hAp phO chAt c ch ln b

mt in cc3 hAp phO n8y \ l8m ng0n cLn " h1a tan "Yt. hay l8m giLm

t#c h1a tan "Yt t%ong mZi t%EVng axit3

?v ph$ c thI thAy. in t%Q ca Cung CDch %At thAp. g!n nhE bdng *3

4in t%Q phWn cc t%ong Cung CDch axit l85 Up.* 7 )).)

4in t%Q phWn cc t%ong Cung CDch axit c chAt c ch5 Up.) 7 ).

?#c 0n m1n ca thp tj l nghDch '>i in t%Q phWn cc. 'H th c thI

t@nh EFc hiu GuL bLo ' ca chAt c ch thZng Gua in t%Q phWn cc5

7 )** (Up.)- Up.*2BUp.) . z

7 )** ().M)).)2B). 7 qq./z

?v kt GuL t@nh ton n8y c thI thAy hiu GuL bLo ' ca u%oth%ophin #i

'>i thp t%ong axit +9*./{ Q thVi iIm ban !u chj &t qq./z3

Clk

R

Rp

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7/8

2( T7ng t&8 ;FD mng 1n

Hnh 6 Ah '()ui*t ca

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8/8

Hnh G .ng tr ca h *n tr0ng dung d&ch 'aC -56D thF0 tn *I

Tr0 r1ng: trc thc th!o lg4H chEa c Gu t%Hnh 0n m1n kim lo&i CE>i l>p "Kn nn "K J tEKng

EKng ca h nhE "au5

Hnh J S tng ng ca