Chem Formal Write Up 1.pdf

2 the use of aluminum foil eliminated the error of

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2. The use of aluminum foil eliminated the error of uneven heating because the aluminum foil is a very good heat conductor resulting in even temperature all over its surface. 3. Table 3. Substances that are electrolytes and substances that are not. Sucrose Sodium Chloride A D E F nonelectrolyte electrolyte nonelectrolyte nonelectrolyte electrolyte nonelectrolyte 4. Electrolytes were able to conduct electricity as aqueous solutions, but not as solids because the electrolytes have ionic bonds. Ionic bonds are very brittle as solids because
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they have immobile valence electrons. When dissolved in water, they break apart. When this happens, electrons become free and mobile which allows them to conduct electricity. 5. Molecular substances are composed of only nonmetals which share electrons to form covalent bonds while ionic substances are combinations of metals and nonmetals who transfer electrons to form ionic bonds. 6. Chlorine can be used to make both ionic compounds (Sodium Chloride) and molecular compounds (Fluorine). Conclusion In conclusion, the classification of the substances were determined based on solubility, conductivity, initial appearance and melting point. Using the data we were able to conclude that sucrose and flourine were molecular and non-electrolytes while sodium chloride, B, and D were ionic and electrolytes. One possible source of human error is that by not cleaning off the electrodes or using the same mixing wooden splint, all the water mixtures could have been contaminated producing inaccurate test results. Also, accidentally putting some of the substances in the same pile as others could have produced inaccurate test results when testing melting point.
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