鍖栧璁￠噺涓庡寲瀛﹁绠?/p>
1
锛?/p>
[2019
鏂拌鏍団叀]
宸茬煡
N
A
鏄樋浼忓姞寰风綏甯告暟鐨勫�硷紝涓嬪垪璇存硶閿欒鐨勬槸
A
锛?/p>
3 g
3
He
鍚湁鐨勪腑瀛愭暟涓?/p>
1
N
A
B
锛? L 0.1 mol路L
鈭?/p>
1
纾烽吀閽犳憾娑插惈鏈夌殑
3
4
PO
飥?
鏁扮洰涓?/p>
0.1
N
A
C
锛?/p>
1 mol K
2
Cr
2
O
7
琚繕鍘熶负
Cr
3+
杞Щ鐨勭數瀛愭暟涓?/p>
6
N
A
D
锛?/p>
48 g
姝ｄ竵鐑峰拰
10 g
寮備竵鐑风殑娣峰悎鐗╀腑鍏变环閿暟鐩负
13
N
A
銆愮瓟妗堛�?/p>
B
銆愯В鏋愩�?/p>
A
锛?/p>
3
He
鐨勪腑瀛愭暟涓?/p>
3-2=1
锛屽垯
3g
3
He
鐨勪腑瀛愭暟涓?
=N
A
锛?/p>
A
椤规纭紱
B
锛庣７閰搁挔涓哄己纰卞急閰哥洂锛岀７閰告牴绂诲瓙鍦ㄦ按婧舵恫涓細鍙戠敓姘磋В锛屽垯
1L 0.1mol/L
鐨勭７閰搁挔婧舵恫涓７閰告牴绂诲瓙
鐨勪釜鏁板皬浜?/p>
1L脳0.1mol/L脳N
A
mol
-1
=0.1N
A
锛?/p>
B
椤归敊璇紱
C
锛?/p>
閲嶉摤閰搁捑琚繕鍘熶负閾瀛愭椂锛?/p>
閾厓绱犱粠
+6
闄嶄綆鍒?/p>
+3
锛?/p>
1mol
閲嶉摤閰搁捑杞Щ鐨勭數瀛愭暟涓?/p>
3mol脳2脳N
A
mol
-1
=6N
A
锛?/p>
C
椤规纭紱
D
锛庢涓佺兎涓庡紓涓佺兎鐨勫垎瀛愬紡鐩稿悓锛?/p>
1
涓垎瀛愬唴鎵�鍚叡浠烽敭鏁扮洰鍧囦负
13
涓紝鍒?/p>
48g
姝ｄ竵鐑蜂笌
10g
寮備竵鐑锋墍寰?/p>
鐨勬贩鍚堢墿涓叡浠烽敭鏁扮洰涓?/p>
48g+10g
58g/mol
脳13脳N
A
mol
-1
=13N
A
锛?/p>
D
椤规纭紱
绛旀閫?/p>
B
銆?/p>
2
锛?/p>
[2019
鏂拌鏍団參]
璁?/p>
N
A
涓洪樋浼忓姞寰风綏甯告暟鍊笺�傚叧浜庡父娓╀笅
pH=2
鐨?/p>
H
3
PO
4
婧舵恫锛屼笅鍒楄娉曟纭殑鏄?/p>
A
锛庢瘡鍗囨憾娑蹭腑鐨?/p>
H
+
鏁扮洰涓?/p>
0.02
N
A
B
锛?/p>
c
(H
+
)=
c
(
4
2
H
PO
飥?/p>
)+2
c
(
2
4
HPO
飥?/p>
)+3
c
(
3
4
PO
飥?/p>
)+
c
(OH
鈭?
)
C
锛庡姞姘寸█閲婁娇鐢电搴﹀澶э紝婧舵恫
pH
鍑忓皬
D
锛庡姞鍏?/p>
NaH
2
PO
4
鍥轰綋锛屾憾娑查吀鎬у寮?/p>
銆愮瓟妗堛�?/p>
B
銆愯В鏋愩�?/p>
A
銆佸父娓╀笅
pH
锛?/p>
2
锛屽垯婧舵恫涓阿绂诲瓙娴撳害鏄?/p>
0.01mol/L
锛屽洜姝ゆ瘡鍗囨憾娑蹭腑
H
锛?
鏁扮洰涓?/p>
0.01
N
A
锛?/p>
A
閿欒锛?/p>
B
銆佹牴鎹數鑽峰畧鎭掑彲鐭ラ�夐」
B
姝ｇ‘锛?/p>
C
銆佸姞姘寸█閲婁績杩涚數绂伙紝鐢电搴﹀澶э紝浣嗘阿绂诲瓙娴撳害鍑忓皬锛?/p>
pH
澧炲ぇ锛?/p>
C
閿欒锛?/p>
D
銆佸姞鍏?/p>
NaH
2
PO
4
鍥轰綋锛?/p>
H
2
PO
4
锛?/p>
娴撳害澧炲ぇ锛屾姂鍒剁７閰哥殑鐢电锛屾憾娑茬殑閰告�у噺寮憋紝
D
閿欒锛?/p>
绛旀閫?/p>
B
銆?/p>