(Solved): 4. Use the melting point composition diagram for substances A \& B to answer the following questio ...

4. Use the melting point composition diagram for substances A \& B to answer the following questions: A. What are the melting point and composition at the eutectic? (4 pts) B. What is the approximate melting point range of a mixture of \( 80 \mathrm{~mol} \% \mathrm{~A} \) and \( 20 \mathrm{~mol} \% \mathrm{~B} \) ? (2pts) 5. If a melting point for an organic acid is \( 112-114 \mathrm{C} \), state if the melting point will be higher or lower for the compounds described in A \& B and explain why. (4pts) A. The potassium salt of the organic acid. B. A non-polar hydrocarbon with the same molecular with as the organic acid.