已知液氨的性质与水相似，25℃时，NH3+NH3
NH4++NH2-,NH4+离子的平衡浓度为1×10-15mol/L，则下列说法中正确的是 （ ）
| A．在液氨中加入NaNH2可使液氨的离子积变大 |
| B．在液氨中加入NH4Cl可使液氨的离子积减小 |
| C．在此温度下液氨的离子积为1×10-30 |
| D．在液氨中放入金属钠，可生成NaNH2 |
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