I have been studying Benedicts solution and have come across another blue solution, Biurets Solution. What are the differences in composition of these two chemicals?
Igloo writes … Biurets solution, used in the biuret test, contains a mixture of copper(II) sulphate, potassium tartrate, and potassium iodide all dissolved in sodium hydroxide. This blue solution is used to test for the presence of soluble proteins in a liquid, e.g. egg white. Benedicts solution is a mixture of aqueous copper(II) sulphate, sodium citrate and sodium carbonate and is used to test for aldehydes and reducing sugars. Both solutions are blue because they contain copper(II) ions. In both the coppper(II) are present as complex ions. The stable complexes keep the metal ions in solution despite the presence of alkali which would otherwise precipitate them as copper(II) hydroxide. Risk assessment Before attempting any practical work based on the advice and suggestions on this website, you must do the following. Identify any hazards, assess the risks from these hazards, and then decide appropriate control measures to reduce the risks. You must have these approved by those in aut
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