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问题:

【思维拓展】小媚受小斌实验的启发,将图2装置进一步改装成图3装置,用于验证二氧化碳的性质。 (1)打

【思维拓展】小媚受小斌实验的启发,将图2装置进一步改装成图3装置,用于验证二氧化碳的性质。

(1)打开活塞K滴入稀硫酸后,两条用紫色石蕊试液润湿的试纸发生的相同变化是___________,不同变化是____________,小媚从课本实验中知道,二氧化碳和水本身都不能使石蕊变色,因而她认为以上两个变化验证的二氧化碳的性质依序是_______________、_______________。


  参考答案

正确答案:
(1)试纸由紫色变红色(答出“变红”即可,只答“变色”不给分)
下面的试纸先变红 或 两条试纸变色的快慢不同 或 两条试纸变色的深浅不同(若答“下面试纸变红,上面试纸不变红”不给分,其它合理答案均给分)
二氧化碳和水反应生成了酸(碳酸或酸性物质)
二氧化碳的密度比空气大 或 二氧化碳比空气重 (合理答案均给分。顺序错误不给分)

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