2020中考化学复习满分必刷题04 实验20题

满分必过实验

题_______________________________

A

_____________________________

F

_____

K_________

K___________

O+O

）①过氧化氢在二氧化锰催化作用下生成水和氧气，反应的化学方程式为： O+OA

F

K:__________A________________(__________F_____

F_______(______(E______

___________:___________A

O+O B

A

A

O+OFF

BE

b A

O+O

+H

B

b

O+O+H

B =

IA B E b

E

请从溶解度

的角度分析，实验

中不采用降低溶液

温度的方法得到精

盐的 ）。I．（

b

O+OK+MnO+O

BⅡ．（ I．（

b

O+OB K+MnO+O

E

Ⅱ．（×

________B

______________A B B

B

________

________

O+OB O+O

B

B

E

________

________(，用装置

________E

________

________

___________________________________________________(________(bd A +H

=H A

E

A+H=H

b

d

K

K

K

K

K

K

K

K

K

K________________________________。（________

________(

________________________

________________________________________

________

X

________________________

________

+H

B

K+OFB

K+O

________________(________________A

B

________

A

________

B

+H ________________Ab +HE

A

b

+H

A

B

AB

B

________AB

________

________________

X

________________A

AB

A；（

X

+HCl

+H

K

K

K

K

K

A

________B

________

________

________________

K

________________+H】（

+H

+HB

K

________________________________________ A K+MnO+O +H A K+MnO+O

：

：

+H________A________________________________

F________ CE A b

A

CEA

FAb________________________

________________________________________________(____________________________________

____________

A

A

A

________________________

______________________ B

A

B

B．（

____________mL______________AB_______________________________AB

_________________________

+HA

+H

A.:

II m m m

m:_________________________

mmmm______）。_____A

m Bm-mm-m m

m

高温

-m

-m

AB【解析】（

高温

IIIII

=

=

固体质量变化

-m

m

-m

Am-mAm