284634201
瀹氶噺
鍒嗘瀽鍖栧璇曞嵎
绗?/p>
1
椤碉紙鍏?/p>
11
椤碉級
澶嶆牳鎬诲垎
澶嶆牳浜?/p>
鎬?/p>
鍒?/p>
棰?/p>
鍙?/p>
涓�
浜?/p>
涓?/p>
鍥?/p>
棰?/p>
鍒?/p>
20
10
20
50
鍚堝垎浜?/p>
寰?/p>
鍒?/p>
寰楀垎
璇勫嵎浜?/p>
澶嶆煡浜?/p>
1.
浠婃鐢?/p>
H
3
PO
4
涓?/p>
NaOH
鏉ラ厤鍒?/p>
pH=7.20
鐨?/p>
缂撳啿婧舵恫
锛屽垯
H
3
PO
4
涓?/p>
NaOH
鐗╄川
鐨勯噺涔嬫瘮
n(H
3
PO
4
):n(NaOH)
搴斿綋鏄?/p>
(
)
(H
3
PO
4
鐨?/p>
pK
a
1
锝?/p>
pK
a3
鍒嗗埆鏄?/p>
2.12, 7.20, 12.36)
A
锛?/p>
1:1
B
锛?/p>
1:2
C
锛?/p>
2:1
D
锛?/p>
2:3
涓�閰镐竴纰?/p>
锛屾墍浠ラ吀
2
锛屼竴浠戒笌纰卞弽搴旓紝涓�浠借嚜鐣欙紝浠ュ舰鎴愮紦鍐?/p>
2.
鐢ㄩ搱閲忔硶娴嬪畾閾佹椂锛屾淮瀹氳嚦
50%
鏃剁殑鐢典綅鏄?/p>
(
)
[
宸茬煡姝ゆ潯浠舵椂
E
肖鈥?/p>
(Ce
4+
/Ce
3+
)=1.44 V
锛?/p>
E
肖鈥?/p>
( Fe
3+
/Fe
2+
)=0.68 V]
A
锛?/p>
0.68 V
B
锛?/p>
1.44 V
C
锛?/p>
1.06 V
D
锛?/p>
0.86 V
3.
鐢ㄤ經灏斿搱寰锋硶娴嬪畾
Ag
+
锛屾淮瀹氬墏鏄?/p>
(
)
A
锛?/p>
NaCl
B
锛?/p>
NaBr
C
锛?/p>
NH
4
SCN
D
锛?/p>
Na
2
S
4.
鍏鐢插熀鍥涜兒
[(CH
2
)
6
N
4
]
缂撳啿婧舵恫鐨?/p>
pH
缂撳啿鑼冨洿鏄?/p>
(
)
{pK
b
(CH
2
)
6
N
4
=8.85}
A
锛?/p>
4~6
B
锛?/p>
6~8
C
锛?/p>
8~10
D
锛?/p>
9~11
5.
NH
3
鐨?/p>
K
b
=1.8脳
10
-5
, ph-COOH
鐨?/p>
K
a
=6.2脳
10
-5
, H
2
CO
3
鐨?/p>
K
a1
=4.2脳
10
-7
,
K
a2
=5.6脳
10
-11
, H
2
C
2
O
4
鐨?/p>
K
a1
=5.9脳
10
-2
, K
a2
=6.4脳
10
-5
,
鏈夊叧鐗╄川纰辨�у己搴︿粠澶у埌灏?/p>
搴斾负
(
)
A
锛?/p>
ph-COO
-
>NH
3
>HC
2
O
4
-
>CO
3
2-
B
锛?/p>
CO
3
2-
>NH
3
>ph-COO
-
>HC
2
O
4
-
200
骞?/p>
鏈堟睙鑻忕渷楂樼瓑鏁欒偛鑷鑰冭瘯
284634201
瀹氶噺鍒嗘瀽鍖栧锛堝洓锛?/p>
涓�銆佸崟椤归�夋嫨棰橈紙姣忓皬棰?/p>
1
鍒嗭紝鍏?/p>
20
鍒嗭級
鍦ㄤ笅鍒楁瘡灏忛鐨勫洓涓閫夌瓟妗堜腑閫夊嚭涓�涓纭殑绛?/p>
妗堬紝骞跺皢鍏跺瓧姣嶆爣鍙峰～鍏ラ骞茬殑鎷彿鍐呫�?/p>