Chapter 3, Problem 3Q

Interpretation Introduction

Interpretation:

The proof that the test tubes contain three different chemical compounds should be given. Also, the minimumnumber of melting points needed to proof that should be determined.

Concept introduction:

Temperature at which an element changes from the solid state to the liquid state is known as melting point or sometimes liquefaction point. At the melting point, both solid and liquid phase coexist in equilibrium. It depends on the pressure and is normally defined at the standard pressure $\left(1\text{atm}\right)$.

Mixed melting point is a techniquethat is used to identify chemical compounds. It is used when a substance of known identity and melting point is mixed with another unknown substance to calculate its melting point.