问题 问答题

2009年2月20日6:20分左右江苏省盐城市许多市民在饮用自来水时闻到刺鼻的农药味.经检测,该市城西自来水厂的水源受到盐城市标新化工有限公司排放的酚类化合物的污染,如苯酚就属于酚类化合物,苯酚是一种有毒的物质,对皮肤、黏膜有强烈的腐蚀作用,其化学式为(C6H6O).苯酚也是很多医药(如水杨酸、阿司匹林及磺胺药等)、合成香料、染料的原料.此外,苯酚的稀水溶液可直接用作防腐剂和消毒剂

(1)苯酚属于______(填“有机物”或“无机物”).

(2)苯酚中碳、氢、氧质量之比______.

(3)现要配制质量分数为5%的苯酚溶液1500Kg做消毒剂,需要苯酚______kg.

答案

(1)有机物的定义是含有碳元素的化合物(除一氧化碳、二氧化碳、碳酸盐外),因为苯酚的化学式为C6H6O,所以属于有机物;

(2)苯酚的化学式为C6H6O,其中碳、氢、氧质量之比12×6:1×6:16=12:1:2;

(3)需要苯酚的质量为1500Kg×5%=75Kg.

故答案为:(1)有机物

(2)12:1:2

(3)75

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