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（1）除了水是常见的溶剂外，还有酒精、液氨等也可以作溶剂．下表是一些物质25℃时在无水酒精中的溶解度（100g溶剂）．根据下表回答：

物质Ca（NO3）2CaCl2Ba（NO3）2BaBr2CaBr2NaOHNaCl
溶解度/g33.920.50.0023.9634.814.70.07
请选用表中两种物质作反应物，写出它们在无水酒精中所发生的复分解反应的化学方程式______．

（2）TiO2的“纳米材料”有广泛的应用，工业上制取TiO2的方法是：2FeTiO3+7Cl2+3C=2X+2FeCl3+3CO2，X的化学式______；X再与氧气反应生成TiO2和氯气，该反应的化学方程式：______．

答案

（1）根据表格可知：25℃时硝酸钡难溶于无水酒精，且硝酸钡是一种盐；要生成硝酸钡，反应物均需可溶，硝酸钙和溴化钡均符合条件，二者反应生成硝酸钡沉淀和溴化钙，反应的化学方程式为：Ca（NO3）2+BaBr2═Ba（NO3）2↓+CaBr2．

（2）根据反应的化学方程式2FeTiO3+7Cl2+3C=2X+2FeCl3+3CO2，反应物中铁、钛、氧、氯、碳原子个数分别为2、2、6、14、3，反应后的生成物中铁、钛、氧、氯、碳原子个数分别为2、0、6、6、3，根据反应前后原子种类、数目不变，则2X中含有2个钛原子和8个氯原子，则每个X分子由1个钛原子和4个氯原子构成，则物质X的化学式为TiCl4．

TiCl4再与氧气反应生成TiO2和氯气，反应的化学方程式为：TiCl4+O2═TiO2+2Cl2．

故答案为：（1）Ca（NO3）2+BaBr2═Ba（NO3）2↓+CaBr2；（2）TiCl4；TiCl4+O2═TiO2+2Cl2．

单项选择题

缺血性周围性发绀可见：于

A．缩窄型心包炎

B．下肢静脉曲张

C．雷诺(Raynau病

D．发绀型先天性心脏病

E．血栓性静脉炎
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How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
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