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Homework answers / question archive / You were asked to determine the melting point of an unknown compound in order to identify as one of the compounds you had previously examined

You were asked to determine the melting point of an unknown compound in order to identify as one of the compounds you had previously examined

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You were asked to determine the melting point of an unknown compound in order to identify as one of the compounds you had previously examined. What else could you have done to make sure that your unknown was indeed the compound you believed it to be and not just a compound that had a similar melting point?

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Since we are talking about detecting the melting point of our compound, we will then assume with reasonable basis that our compound is a solid. Another way to verify the identity of the compound is by determining its density. We can separately measure the sample's mass and then measure its volume through, maybe, water displacement methods. we can use density as our defining factor here because density is a unique property to each element and compound.

We can divide the measured mass by the measured volume to get the density of the compound, and apply necessary calculations to determine the margins of error. If the percentage error is reasonably small, then we can thus use the density as a definitive proof of the substance's identity.