the elution strength € of hexane is equal to 0.2 and ethanol is equal to 0.8...

the elution strength € of hexane is equal to 0.2 and ethanol is equal to 0.8 calculate the volume needed from each to prepare 200 ml mixture of the two with eluting syrength equal 0.3

Expert Solution

The elution strength of a mixture can be calculated as:

Where ε are the elution strengths and x are the volume fractions of the components.

We need to calcultate the x of hexane and ethanol to get a mixture with ε = 0.3. We have these two equations:

And:

We combine these:

And:

Since we want to prepare 200 mL, this means we have to add:

queen_honey_blossom answered 2 years ago

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