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Is Benedicts reagent a protein?

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    Is Benedicts reagent a protein

    (Original post by Hollyd13)
    Is Benedicts reagent a protein? Also what would happen to the experiment of testing for reducing sugars if water from the water bath accidentally mixes with the Benedicts solution and the reducing sugars?
    Benedicts reagent isn't a protein, it's complex ion (transition metal- I think copper) which is attached to different molecules/ligands (I believe NH3 and water). This is learnt in A Level Chemistry by the way.

    If it's a small amount of water, then probably nothing, however I'm not sure for larger volumes of water (the water could act as a ligand and replace NH3 ligand), but again I'm uncertain.

    Benedict's reagent is a solution of sodium citrate, sodium carbonate, and cupric sulphate pentahydrate, according to Wikipedia; when it's mixed with a solution containing reducing sugars, the cupric ion is reduced and precipitates as cuprous oxide, which is visibly red. So no, it's a mixture of ionic compounds, not a protein.

    If water from the water bath gets into the solution, I suppose it would dilute the solution and might make it more difficult to discern the colour change? It wouldn't be that big of a problem, but you should still avoid it.
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