体积分数怎么转换成摩尔分数?95%酒精,15%酒精,93.5%酒精,17%酒精,20%酒精
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![体积分数怎么转换成摩尔分数?95%酒精,15%酒精,93.5%酒精,17%酒精,20%酒精](/uploads/image/z/269691-51-1.jpg?t=%E4%BD%93%E7%A7%AF%E5%88%86%E6%95%B0%E6%80%8E%E4%B9%88%E8%BD%AC%E6%8D%A2%E6%88%90%E6%91%A9%E5%B0%94%E5%88%86%E6%95%B0%3F95%25%E9%85%92%E7%B2%BE%2C15%25%E9%85%92%E7%B2%BE%2C93.5%25%E9%85%92%E7%B2%BE%2C17%25%E9%85%92%E7%B2%BE%2C20%25%E9%85%92%E7%B2%BE)
体积分数怎么转换成摩尔分数?95%酒精,15%酒精,93.5%酒精,17%酒精,20%酒精
体积分数怎么转换成摩尔分数?95%酒精,15%酒精,93.5%酒精,17%酒精,20%酒精
体积分数怎么转换成摩尔分数?95%酒精,15%酒精,93.5%酒精,17%酒精,20%酒精
设体积分数为w的酒精中含有V体积的酒精,则溶液的总体积为V|w
常温下纯酒精的密度是0.8g|cm3
那么酒精溶液中含有的酒精质量m(CH3CH2OH)= 0.8 * V
酒精即乙醇的相对分子质量是M(CH3CH2OH)= 46g|mol
那么溶液中酒精的物质的量为n(CH3CH2OH) = m|M = 0.8V|46
则溶液中酒精的摩尔分数即物质的量浓度c(CH3CH2OH) = n|V(总) = (0.8V|
46) | (V|w)= (2w|115) mol|L
所以体积分数95%的酒精对应的摩尔分数为c1 = 2*95%|115 = 0.0165 mol|L
体积分数15%的酒精对应的摩尔分数为c2 = 2*15%|115 = 0.0026 mol|L
体积分数93.5%的酒精对应的摩尔分数为c3 = 2*93.5%|115 = 0.0163 mol|L
体积分数 17%的酒精对应的摩尔分数为c4 = 2*17%|115 = 0.0030 mol|L
体积分数 20%的酒精对应的摩尔分数为c5 = 2*20%|115 = 0.035 mol|L
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