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58问答库 > 浓度是多少的硫酸的PH值是4

浓度是多少的硫酸的PH值是4

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2025-04-04 13:27:08

推荐回答（1个）

回答（1）：

"ml/l"这样的浓度很少见，可以看做是一升溶液中所含用来配制溶液的原来溶剂的体积。本题可以理解为每升溶液所加入的浓硫酸的体积。
本题没有给出浓硫酸的浓度是多少，浓硫酸的物质的量浓度可以达到12mol/L,如果用这样的硫酸来配制PH=4的溶液，浓硫酸的用量极少，对溶液的体积影响小,可以忽略不计，即一升水加入硫酸后溶液体积保持不变。
PH=4,时氢离子的浓度为0.0001mol/L，配制1升溶液所用的浓硫酸的体积是0.0001/2/12=0.000004167L=0.004167ml
可以看做一升的水里加0.00416毫升浓硫酸会使所得的稀硫酸溶液PH=4

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