Chapter 17
Chemical Principles in the Laboratory · 3 exercises
Problem 2
If we classify substances as ionic, molecular, macromolecular, or metallic, in which if any categories are all the members a. soluble in water? b. electrical conductors in the melt? c. insoluble in all common solvents? d. solids at room temperature?
4 step solution
Problem 3
A given substance is a white, granular solid at \(25^{\circ} \mathrm{C}\) that does not conduct electricity. It melts at \(750^{\circ} \mathrm{C}\) without decomposing, and the melt conducts an alternating electric current. It dissolves readily in water, to produce an electrically conductive solution. What would be the proper classification of the substance, based on this information?
4 step solution
Problem 4
A lustrous gray-white solid melts at \(1650^{\circ} \mathrm{C}\). It is electrically conductive as both a solid and a liquid, but not soluble in either water or any organic solvent. Classify the substance as best you can from these properties.
4 step solution