lab 1 notes Separation Techniques.docx - Separation...

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Separation Techniques There are many techniques that can be used to separate mixtures. For components of a mixture to be separated, there must be a property or set of properties that are different for each of the components. For example, iron shavings can be separated from mixtures using a magnet due to their magnetic properties. Volatility , the ease with which a substance becomes a gas, is used to separate water from salt solutions. Differences in s olubility and density are often used as well. When mixtures are separated, the composition of the mixture is often reported as percent by mass which is determined using the following equation. % m/m = m A / m sample × 100 where % m/m is the percent of component A, m A is the mass of component A, and m sample is the mass of the original sample. Lab separation techniques and the properties that are used in order to carry out the separation are summarized in Figure 2 . Technique Physical Property Description centrifugation density Separates insoluble materials from a liquid where normal filtration does not work well.

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