Purification

You will wash the filtered product in ice-cold water until the wash is neutral.
Where should you place the pH paper in order to sample the acidity of the wash?

illustration of a filtration setup in which a conical filter funnel is seated in an Erlenmeyer flask with a test tube containing both liquids and solids being poured into the funnel; solids appear to catch in the filter funnel while liquid gathers in the bottom of the flask; the illustration is annotated to show three positions; position “A” points to the solids caught in the filter funnel; position “B” points to a drop of green liquid just emerging from the bottom of the funnel; position “C” points to the pool of liquid gathered in the bottom of the flask

Pedersen & Myers 2011

A. inside the Hirsch funnel

B. just below the Hirsch funnel

C. in the bottom of the filter flask

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