Test for Carbonyls

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5 Terms

1
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Tollens’ reagent is added to an aldehyde.

Write an equation for the reduction reaction that occurs.

Ag+(aq) + e- —> Ag (s)

2
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When 2,4-DNP is added to an aldehyde or ketone, a(n)...

orange precipitate forms

3
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We can remove impurities from our DNP derivative using…

recrystallisation

4
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How do we determine the identity of a compound using 2,4-DNP? (4)

1)we first add 2,4-DNP to the compound.
2)Next, we recrystallise/purify the DNP derivative

3)We then measure the melting point

4)Finally, we compare this value to a databook

value

5
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What chemical can be used to identify both aldehydes and ketones?

2,4-DNP