已知某温度下AgCl(s)的溶度积常数Ksp＝1×10－10。在该温度下，向50 mL 0.018 mol/L的AgNO3溶液中加入50 mL 0.02 mol/L的盐酸，生成沉淀（混合后溶液的体积变化忽略不计）。下列说法正确的是
| A．沉淀生成后，溶液中NO3－的浓度1.8×10－2 mol/L |
| B．沉淀生成后，溶液的pH为2 |
| C．沉淀生成后，溶液中Ag＋的浓度1×10－5 mol/L |
| D．AgCl的溶解性为难溶，则该物质不溶于水 |
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