Recent content by phildukephd

Opalescence usually is due to particles large enough to reflect light, possibly a colloidal solution. If so remove the colloid by filtration, centrifugation, precipitation, etc., make sure your distilled water is pure. Since mannitol is very water soluble, the opalescence is likely due to an...

Look in a reference source for the solubility of mannitol in distilled water. If it is greater than 0.05% an impurity may be causing the opalescence. If so try filtration to remove it, or gentle heating to precipitate it. Purification by crystallization or chromatography may be in order. What...

How gravity works and why it works as it does are two different questions. I am very pleased by Wannabe Newton's Post, it is all excellent, and I especially like the statement "...it is not a force..." Of historical interest, in Sir Isaac's Letters to Bentley he stated clearly that he did not...