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| 物质/溶解度/g/温度 | 10℃ | 20℃ | 30℃ | 40℃ | 50℃ | 60℃ | 70℃ | 80℃ |
| NaCl | 35.8 | 36.0 | 36.3 | 36.6 | 37.0 | 37.3 | 37.8 | 38.4 |
| KNO3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110 | 138 | 169 |

| 温度/℃ | 10 | 20 | 30 | 40 | 50 | 60 | |
| 溶解度/g | NaCl | 35.8 | 36.0 | 36.3 | 36.6 | 37.0 | 37.3 |
| KNO3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110.0 | |

一定温度下,将一定质量的NaCl溶液恒温蒸发溶剂,蒸发溶剂质量与析出晶体质量的关系如图所示。


| 温度(℃) | 0 | 20 | 40 | 60 | 80 | 100 | |
| 溶解度(g/100g水) | 氯化钠 | 35.7 | 36.0 | 36.6 | 37.3 | 38.4 | 39.8 |
| 氯化钾 | 27.6 | 34.0 | 40.0 | 45.5 | 51.1 | 56.7 | |


将30g固体物质X(不含结晶水)投入盛有20g水的烧杯中,搅拌,测得溶液的质量分别如图中A、B、C、D点所示。回答下列问题:(1)0℃时,物质X的溶解度是 。

| 温度/℃ | 0 | 10 | 20 | 30 | 40 | 50 | |
| 溶解度/g | NaCl | 35.7 | 35.8 | 36.0 | 36.3 | 36.6 | 37.0 |
| KNO3 | 13.3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | |

| 温度/℃ | 10 | 20 | 30 | 40 | 50 | 60 | |
| 溶解度/g | NH4Cl | 33.3 | 37.2 | 41.4 | 45.8 | 50.0 | 55.2 |
| KNO3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110 | |


| 温度/℃ | 0 | 10 | 20 | 30 | 40 | 50 | 60 | |
| 溶解度/g | KNO3 | 13.3 | 20.9 | 31.6 | 45.8 | 63.9 | 85.5 | 110 |
| NaCl | 35.7 | 35.8 | 36 | 36.3 | 36.6 | 37.0 | 37.3 | |


| 温度/℃ | 0 | 20 | 40 | 60 | 80 | |
| 溶解度/g | NaCl | 35.7 | 36.0 | 36.6 | 37.3 | 38.4 |
| KCl | 27.6 | 34.0 | 40.0 | 45.5 | 51.1 | |
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2020-03-27
初中化学 | | 填空题