B是对的.
A：有Fe+3的溶液是呈酸性的,加入氨水会和氢离子反应,而不是和铁离子
C：氢氧化铜也是沉淀,没有写出来
D：热化学方程式的写法不是这样的,应写成生成1mol水
2more-changning 12
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