下列“家庭小实验”不能达到预期目的的是( )    A.用柠檬酸

下列“家庭小实验”不能达到预期目的的是(  )

    A.用柠檬酸、果汁、白糖、水、小苏打等制汽水

    B.用空塑料瓶、小卵石、石英沙、活性炭、膨松棉等制作简易净水器

    C.向洗净的碎鸡蛋壳中加入食盐水可制二氧化碳

    D.用酒精浸泡捣烂的某些植物的花瓣可制酸碱指示剂

 

答案

C

解析:略

 

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