从盐酸、硫酸、石灰水、烧碱、氢氧化钡、纯碱、硝酸钠、氯化钡(

从盐酸、硫酸、石灰水、烧碱、氢氧化钡、纯碱、硝酸钠、氯化钡(均为溶液)八种物质中选出四种,使得各线条相连的物质均能发生反应且生成难溶物。

(1)写出①②③④的化学式:

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(2)写出连线(2)(3)的化学方程式:

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答案

(1)Ba(OH)2  H2SO4  BaClNa2CO3

(2)Ba(OH)2+Na2CO3===BaCO3+2NaOH

H2SO4+BaCl2===BaSO4+2HCl

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