What is meant by a mixed melting-point determination?

Question

anonymous · Answer

A mixed melting point is a way to "estimate" identity of an unknown substance. If you have two solid samples, one known and one unknown, each with a similar melting point and similar properties, you can conduct a mixed melting point to see if they are in fact the same compound

anonymous · Answer

When you mix the two samples, if they are the same material, the melting point will be the same. If they are different, the melting point will be depressed (remember colligative properties?) since each will act as an "impurity" for the other. This is a good way to check if your unknown is the same material as your known.

anonymous · Answer

oh!!!! Thank you so much :)