What result should I have obtained in these tests? Also, what went wrong? [closed]








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As part of a Chemistry practical, I had to five different tests for things, and note down the result. Unfortunately, at least several results were incorrect, and despite hours of research, I cannot fully determine what I was supposed to observe and why.



> 
> ### Part 1 – A test for an alcohol.
> 
> 
> 1. To approximately 1 cm3 of ethanol in a dry test tube, add a small piece of metallic sodium.
> 2. Record your observations.
> 3. Make sure that you dispose safely of any excess sodium using the beaker of ethanol provided.
> 
> 
> 


The liquid turned cloudy white. I can't find any discernible reason why this would be, unless sodium ethoxide is milky white, precipitate or dissolved. Should it just have released bubbles?



> 
> ### Part 2 – A test for an aldehyde using Fehling’s solution.
> 
> 
> 1. In a clean test tube mix together equal volumes of Fehling's solution A and Fehling's solution B. The resultant Fehling's test reagent should be a clear dark blue solution.
> 2. Add 5 drops of this test reagent to 1 cm3 of sodium carbonate solution in a test tube containing a few anti-bumping granules and then add 1 cm3 of ethanal (or propanal) to this same test tube.
> 3. Warm the test tube gently for approximately two minutes in a beaker half-filled with hot water and then gradually bring the beaker of water to boiling and maintain this temperature for a few minutes.
> 4. Using the test tube holder, carefully lift the test tube out of the boiling water and allow its contents to stand for several minutes.
> 5. Record your observations.
> 
> 
> 


The liquid turned murky green. My understanding is that it's supposed to be red? I'd love to have a chemical equation for this as well.



> 
> ### Part 3 – A test for an alkene (a test for unsaturation)
> 
> 
> 1. To approximately 1 cm3 of cyclohexene in a test tube, add an equal volume of bromine water and shake the contents of the tube vigorously from side to side.
> 2. Record your observations.
> 
> 
> 


The liquid went colourless. This one went as expected, I believe. My understanding is that it went colourless because all the bromine reacted?



> 
> ### Part 4 – A test for a carboxylic acid
> 
> 
> 1. Place one small spatula measure of solid sodium hydrogencarbonate in a test tube and add to it approximately 2 cm3 of dilute ethanoic acid.
> 2. Record your observations.
> 
> 
> 


The liquid produced bubbles, went cloudy, then went colourless. No explanation here.



> 
> ### Part 5 – A test for a haloalkane.
> 
> 
> 1. Using a teat pipette, add approximately 5 drops of 1-bromobutane to 1 cm3 of sodium hydroxide solution in a test tube. Warm the contents of the test tube for a few minutes, by placing it into a beaker filled with hot water at approximately 60 C.
> 2. Acidify the contents of the test tube by adding 2 cm3 of dilute nitric acid and then add 1 cm3 of silver nitrate solution.
> 3. Record your observations.
> 
> 
> 


Produced a blue precipitate after the bromobutane was added, and went colourless after we added the silver nitrate solution. No explanation here either.


Not enough time has elapsed as of now, but I will put reputation on this, and award it to a sufficient answer as soon as I am able.


