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Describe how you test for an aldehyde or ketone and distinguish between the two.

To test for an aldehyde or ketone you would use 2,4-dinitrophenylhydrazine (2,4-DNP). 2,4-DNP mixed with methanol and sulphuric acid is knows as Brady's reagent. If a yellow/orange precipitate is formed when...
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Answered by Shivali J. • Chemistry tutor
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A compound, HOCH2CH2CH2CH2COCl, reacts with itself to give a new compound. Give the IUPAC name for the starting compound, draw the mechanism for the formation of the new compound and give the prominant feature of the IR spectrum of the new compound.

This compound is highly unstable, and it's IUPAC name would be 5-hydroxypentyl chloride . The "hydroxy" part is from the OH alcohol group, "pent" from the number of carbons in the chain, ...
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Answered by David H. • Chemistry tutor
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What is optical isomerism and how can you distinguish between optical isomers?

A molecule will exhibit optical isomerism if it contains a chiral centre / an asymmetric carbon atom - in other words, if it contains a carbon atom with 4 different groups attached. Due to this property, the...
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Answered by Beth S. • Chemistry tutor
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What is an acid-base pair?

Two species that transform into each other by loss or gain of a proton.
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Answered by Laura H. • Chemistry tutor
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If hydrogen was burnt in a chamber full of oxygen, what would be the effect on the chamber pressure and why?

The equation for the reaction is; 2H 2 +O 2 = 2H 2 O From the equation it can be seen that 2 moles of hydrogen reacts with 1 mole of oxygen to produce 2 moles of water vapour. Since the reaction used more mo...
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