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1. Explain what effects each of the following improper packing techniques for the melting point tube...

1. Explain what effects each of the following improper packing techniques for the melting point tube would have on the observed point range. (a) too much sample; (b) sample packed too loosely.

2. What two effects does adding an impurity have on the melting point range of a compound?

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Answer #1

1.a if too much sample is used in melting point analysis, it tends to increase the melting point of the compound and larger samples tend to melt unevenly so melting range will also be increased

b. If sample is packed loosely leaving more gaps in between then it will melt fast giving a false lower melting point reading.

2. Impurities will have 2 effects

First it will decrease the melting point of the compound by weakening of its lattice and second it will increase the range of melting point values.

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