[Ken] figured out how to get around the $500 price tag of a commercial unit by building this DIY melting point test apparatus. In this image he’s using a thermocouple to monitor the temperature ...

Key fact An impure substance is a type of mixture, so melting points can be used to find out if a substance is pure or impure. Impure substances tend to have a slightly lower melting point than ...

THE work of Oldham and Ubbelohde 1 suggested that the melting point of mixtures of dipolar compounds may be much lower than predicted by the Le Chatelier–Schröder (or Hildebrand) equation 2 if ...