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【单选题】
与纯水的电离相似，液氨中也存在着微弱的电离：2NH 3 ?NH 4 + +NH 2 - 据此判断以下叙述中错误的是（ ）A.
液氨中含有NH 3 、NH 4 + 、NH 2 - 等微粒
B.
一定温度下液氨中c（NH 4 + ）?c（NH 2 - ）是一个常数
C.
液氨的电离达到平衡时c（NH 3 ）=c（NH 4 + ）=c（NH 2 - ）
D.
只要不加入其他物质，液氨中c（NH 4 + ）=c（NH 2 - ）
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