1
/
15
鐜颁唬浠櫒鍒嗘瀽涔犻瑙ｇ瓟
20xx
骞存槬
绗?/p>
12
绔?/p>
鐢典綅鍒嗘瀽鍙婄瀛愰�夋嫨鎬х數鏋佸垎鏋愭硶
P216
1.
浠�涔堟槸鐢典綅鍒嗘瀽娉曪紵浠�涔堟槸绂诲瓙閫夋嫨鎬х數鏋佸垎鏋愭硶锛?/p>
绛旓細鍒╃敤鐢垫瀬鐢典綅鍜屾憾娑蹭腑鏌愮绂诲瓙鐨勬椿搴︽垨娴撳害涔嬮棿鐨勫叧绯绘潵娴嬪畾寰呮祴
鐗╄川娲诲害鎴栨祿
搴︾殑鐢靛寲瀛﹀垎鏋愭硶绉颁负鐢典綅鍒嗘瀽娉曘�?/p>
浠ョ瀛愰�夋嫨鎬х數鏋佸仛鎸囩ず鐢垫瀬鐨勭數浣嶅垎鏋愶紝绉颁负绂诲瓙閫夋嫨鎬х數鏋佸垎鏋愭硶銆?/p>
2.
浣曡皳鐢典綅鍒嗘瀽涓殑鎸囩ず鐢垫瀬鍜屽弬姣旂數鏋侊紵閲戝睘鍩虹數鏋佸拰鑶滅數鏋佹湁浣曞尯
鍒紵
绛旓細鐢靛寲瀛︿腑鎶婄數浣嶉殢婧舵恫涓緟娴嬬瀛愭椿搴︽垨娴撳害鍙樺寲鑰屽彉鍖栵紝骞惰兘鍙嶆槧
鍑哄緟娴嬬瀛愭椿
搴︽垨娴撳害鐨勭數鏋佺О涓烘寚绀虹數鏋併�傜數鏋佺數浣嶆亽瀹氾紝涓嶅彈婧舵恫缁勬垚鎴?/p>
鐢垫祦娴佸姩鏂瑰悜鍙樺寲褰卞搷鐨勭數鏋?/p>
绉颁负鍙傛瘮鐢垫瀬銆?/p>
閲戝睘鍩虹數鏋佺殑鏁忔劅鑶滄槸鐢辩瀛愪氦鎹㈠瀷鐨勫垰鎬у熀璐ㄧ幓鐠冪啍铻嶇儳鍒惰�屾垚鐨勩�傝啘
鐢垫瀬鐨勬晱鎰熻啘
涓�鑸槸鐢卞湪姘翠腑婧惰В搴﹀緢灏忥紝涓旇兘瀵肩數鐨勯噾灞為毦婧剁洂缁忓姞鍘嬫垨鎷?/p>
鍒惰�屾垚鐨勫崟鏅躲�佸鏅舵垨娣锋櫠娲?/p>
鎬ц啘銆?/p>
4.
浣曡皳
TISAB
婧舵恫锛熷畠鏈夊摢浜涗綔鐢紵
绛旓細鍦ㄦ祴瀹氭憾娑蹭腑鍔犲叆澶ч噺鐨勩�佸娴嬪畾绂诲瓙涓嶅共鎵扮殑鎯版�х數瑙ｈ川鍙婇�傞噺鐨?/p>
pH
缂撳啿鍓傚拰涓�
瀹氱殑鎺╄斀鍓傦紝鏋勬垚鎬荤瀛愬己搴﹁皟鑺傜紦鍐叉恫
(
TISAB
銆?/p>
鍏朵綔鐢ㄦ湁锛氭亽瀹氱瀛愬己搴︺�佹帶鍒舵憾娑?/p>
pH
銆佹秷闄ゅ共鎵扮瀛愬奖鍝嶃�佺ǔ瀹氭恫鎺ョ數
浣嶃�?/p>
5.
25
C
鏃讹紝鐢?/p>
pH=4.00
鐨勬爣鍑嗙紦鍐叉憾娑叉祴寰楃數姹狅細
鐜荤拑鐢垫瀬涓?/p>
H+
(
a=X
mol?L-1
)|
楗卞拰鐢樻睘鐢垫瀬鈥濈殑鐢靛姩鍔夸负
0.814V
,
閭ｄ箞鍦?/p>
c(HAc)=1.00
X
10-3 mol?L-1
鐨勯唻閰告憾
娑蹭腑锛屾鐢垫睜鐨勭數鍔ㄥ娍涓哄灏戯紵
(
KHAc=1.8
X
10-
璁?/p>
aH+
浜?/p>
[H+])
瑙ｏ細
T
E1=
漏
(+--
漏(
=
漏(
+
)
-
(
K-0.0592pH1)
E2=
漏
(+)
漏(
=
(
+
)
-
(
K-0.0592pH2
鈥⑩�⑩�?nbsp;E2
- E1= E2-0.814=0.0592(pH2- pH1)
鈥⑩�⑩�?nbsp;E2=0.814+0.0592(lg
V
Kc4.00)=0.806
(
V
)