電化學(xué)經(jīng)典習(xí)題電解池

=====3H24 AB

C

===4H24

L

．判斷正誤，正確的畫(huà)“√”，錯(cuò)誤的畫(huà)“×”用銅做陽(yáng)極、石墨做陰極電解

CuCl溶液時(shí)，陽(yáng)極電極反應(yīng)式為－－－↑。( )電解

溶液所發(fā)生反應(yīng)的離子方程式為：電解－＋O=====Cl↑＋H↑＋－。( )根據(jù)得失電子守恒可知電解精煉銅時(shí)，陽(yáng)極減少的質(zhì)量和陰極增加的質(zhì)量相等。( )＋H＋H↑可以設(shè)計(jì)成電解池，但不能設(shè)計(jì)成原電池。( )(

e－

g。 )(

mL

A

B

C

A BC

A

B

C

/

ABC

A

C

B

Cl

AB

XY

I

A

A

g

X

________________

B

________

A

e

C)

A

A

X

/

B

A

AB

C

AB

KOH

KOH

K

KK

AB

________(

___________________________________________________________________

A

____________________________________________________________________

AB

KKK

B

_____________________________________________________________________CEFXY

F

A

_______________________________________________________________________________G

________(________(__________________________________________________

/

LiFePOLiFePO

ABCLiFePOLiAB

LiCLiFePOeLi

===O

AB

C===O

===H

2K

O=====2Cu

=====CuCl

=====

Cl

=====

BC

e

24

A B C A BC K2S

/

mL

L

A

B

C

A B C

Li

Li ALieBLiC

Li

A

BC

．某溶液中含有兩種溶質(zhì)

和

H，它們的物質(zhì)的量之比為∶。滴入幾滴石蕊溶液后，用石墨作電極電解該混合溶液，根據(jù)電極產(chǎn)物，電解過(guò)程可明顯分為三個(gè)階段。下列敘述中，不正確的是( )A．陰極自始至終只產(chǎn)生

HB．電解過(guò)程中，溶液顏色呈現(xiàn)紅色→紫色→藍(lán)色的變化C．電解過(guò)程中，＋和

24－的物質(zhì)的量濃度保持不變．第一階段中陰、陽(yáng)兩極產(chǎn)生的氣體混合引燃后，恰好完全反應(yīng)得到

HCl A

/

BC

e===Ag A

B AK

B

L

NANA

A===4OHB

A

B

/

AAlClAlB===Pb24 AB

===4OH===

===H===2H

. AK

BK

K

K

===2Hb

/

A

Bb

===2H

g

L

Al

O=====Al AB

Al

===Pb

/

AlCl

AlCl ___________________________________________________________

AlCl________

AA

_______________________________________________________________________________________________________________________________(________________________________________________________________________

m

m

/

________g

L

________________________g

________

B

________________________A

Bb

===2H

/

A

________________(

________B(

A)________________________________________________________________________________________________________

________

g

________mL

________mol·L

________.KI

________

Cl

/

AB

KI

C

電解利用

＋＋H↑制取

，若有石墨、鐵棒兩個(gè)電極，石墨上的電極反應(yīng)是__________________________。鐵上的電極反應(yīng)為_(kāi)______________________________________。可選用下列________做電解質(zhì)溶液。．H．

．．

________________________________________

________________________________________________

__________________________________________________________________________________________________________

Al

________

/

________(

________

_______________________________

mL

L

L

mL A

(K

B

C

g

X

________B

A________B________C________(B

mL

mL________(

A

KCl

mL

________(

/

A

B

C

ABC A BC

mL)

________________________________________________________________________B

________________________________________________________________________________________________________________________________________________

AB

L

__________________

AB

____________________

KI

________________________________________________________________________

mL

mL(

__________

/

mL

mL

CuClABC

A

C

g

E

________F

________

_____________________________________________________________mol

______________________________________________________________

mL(

_____________________________________________________________mol

_____________________________________________________________mL(________________ABC

A

B

C

g

________

______________________

e

________________________________________________________________________________________

/

B

___________________________________________________________

C

________________________________________________________________________

A

B

AB

________________

X

__________________________________________________________________

===4H

________________________________________________________________(Cr)

Cr27－

Cr＋

Cr＋

Cr27－

Cr＋

______________________