Chọn đáp án D
a,c,d,f
( a ) C O 2 + 2 N a O H d ư → N a 2 C O 3 + H 2 O
b 2 N O 2 + 2 K O H → K N O 2 + K N O 3 + H 2 O
c 2 A l C l 3 + 3 N a 2 C O 3 + 3 H 2 O → 2 A l O H 3 + 6 N a C l + 3 C O 2
d 2 K H C O 3 + B a O H 2 d ư → B a C O 3 + K 2 C O 3 + 2 H 2 O K 2 C O 3 + B a O H 2 → B a C O 3 + 2 K O H
e A l C l 3 + 4 K O H d ư → 3 K C l + K A l O 2 + H 2 O
f 2 N a C l + 2 H 2 O → D D P D D D , M N X 2 N a O H + H 2 + C l 2