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General Laboratory Techniques
Preparing Solutions with Accurate Measurements
Description
Preparing solutions with accurate measurements is an important lab skill in biological research. A solution is a homogeneous mixture formed when a solute dissolves in a solvent. Solutions are usually identified by their components and by their concentration.
Concentrated solutions can be made les...
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Transcript
对溶液浓度和体积测量背后概念的了解是对几乎每个实验都很重要的两个方面。
溶液是溶质溶解于溶剂之后，形成的一种均一的混合物。溶液通常以它们的成分和相应的浓度命名。
为了准确得到正确的溶液浓度，您必须熟悉许多不同的测量体积的容器。
测量体积时糟糕的技术会导致错误的浓度，以至于影响实验的成功或失败。
了解溶液的准确浓度对于实验操作极为重要。
浓度通常用摩尔来表示。1摩尔溶液是指在1升体积中包含1摩尔的溶质。在实验室中制备溶液时，溶质的摩尔数通过它的质量除以分子量得到。
溶液还可以通过溶质的重量在每单位体积的溶剂内的百分比来显示。称之为...
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