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Determining Chemical Bonding through Melting Points and Conductivity

By analyzing the melting points and conductivity of unknown substances, we can conclude their chemical bonding nature. The experimental results indicate that similarities in behavior with known compounds help identify the bonding type of the unknown substances. In this case, the melting points and conductivity tests suggest the unknown substances are either ionic or polar covalent based on their properties in comparison to known ionic and covalent compounds. This method provides a systematic approach to determining chemical bonding in substances.

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Determining Chemical Bonding through Melting Points and Conductivity

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  1. 5-8 Chem D1

  2. Opener 5-8 Copy down the sentence that convinces you the MOST about its conclusions. • Unknown C is ionic because it is solid. • Unknown C is ionic because it did not melt after 15 seconds. Salt, which is also ionic, did not melt after 15 seconds and has a high melting point. However, since sugar is covalent and took 5 seconds to melt, I concluded C had a high melting point and is ionic. • Unknown C is ionic because it took a long time to melt.

  3. Copy down the sentence that convinces you the MOST about its conclusions. • Unknown A is polar covalent because the conductivity was low. • Unknown A is polar covalent because it dissolved. • Unknown A is polar covalent because it dissolved in water. When we did the t-charts we noticed that MOST polar covalent substances dissolved in water, so I think Unknown A is polar too.

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