Lab 12 Essays

Words: 1086
Pages: 5

1. What is an ionic bond? Typically an ionic bond occurs between one metal and one non-metal ion. One atom borrows one or more electrons from another atom. An ionic bond is a type of chemical bond that occurs when one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion, which then result in attraction. 2. What is a covalent bond? A covalent bond is a bond that occurs when atoms in a molecule share a pair of electrons. For example, “the atoms in sugar do not form ions; instead, they are held together because of shared electrons.”

3. Do you think sugar or salt will melt at a higher temperature? Explain your answer. Since sugar is composed of covalent bonds and salt
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However, the salt has a much higher melting point so perhaps the reaction was so much greater since the transfer of energy was so great, as needed with salt, that there was more to react with for the salt than the sugar.

4. In Part 1, why did you observe a stream of bubbles coming off the steel screw in the salt solution? The salt solution created much more of a reaction and needs a much higher transfer of energy in order to react. The high transfer of energy created constant bubbles, where as with the sugar it did not. Perhaps the transfer of energy was so much for the salt solution that there were only really brief reactions. However, with the salt solution it needs so much energy in order to change so when all the energy is created in the salt solution, there is a much larger reaction.

5. Explain any changes that took place on the nail. The part of the nail that was exposed to the water changed in each solution. When it was in the sugar solution, the color changed very, very slightly. However, when the nail was placed in the salt solution, the part that was exposed changed a lot. The part that was in the salt solution became much darker than the part that was not in the salt solution.

6. In Part 2, which of the substances had the lower melting point? Was this what you expected? Explain your results. The sugar had the