1
/
8
涓撻
02
鍖栧璁￠噺涓庡寲瀛﹁绠?/p>
1
锛?/p>
[2019
鏂拌鏍?/p>
鈪?/p>
]
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 g3He
鍚湁鐨勪腑瀛愭暟涓?/p>
1N
A
B
锛?/p>
1 L 0.1 mol路L鈭?
纾烽吀閽犳憾娑插惈鏈夌殑
PO3
4
鏁扮洰涓?/p>
0.1N
A
C
锛?/p>
1 mol K
2Cr
2O
7
琚繕鍘熶负
Cr3+
杞Щ鐨勭數瀛愭暟涓?/p>
6N
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
13N
A
2
锛?/p>
[2019
鏂拌鏍?/p>
鈪?/p>
]
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
3PO
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>
0.02N
A