20
Apr
Test For Reducing Agent. Nasrightarrow Naaqe- The strongest reducing agents are the alkali metals Group 1 as they have low. A reducing agent is typically in one of its lower possible oxidation states and is known as the electron donor. Br_ 2 l2H_ 2O l rightarrow 2BrO - aq4H aq2e. Thus zinc acts as the reducing agent losing electrons to form zinc ions.
Fehlings solution is a chemical reagent used to differentiate between water-soluble carbohydrate and ketone functional groups and as a test for reducing sugars and non-reducing sugars supplementary to the Tollens reagent test. ELECTRON DONORS Electron donors participate in electron transfer reactions. Thus copperII ions act as the oxidising agent and are reduced to metallic copper. For example sodium is a reducing agent which is itself oxidised as follows. We found that DTT caused statistically significant decreases in the number of ISCs formed at all concentrations tested from 10 mmolL to 50 mmolL. Presence of reducing agents can be tested by adding it to acidified aquous potassium manganate if colour of potassium dichromate is changed from pink to co.
Benedicts reagent test or Benedicts test is used to testing for simple carbohydrates reducing sugars monosaccharides disaccharides.
A reducing sugar can reduce the copper ion in this solution into copper oxide which is a red colored precipitate. Used to detect pentose 5C monosacharides. Use of an Oxidising Agent eg. We found that DTT caused statistically significant decreases in the number of ISCs formed at all concentrations tested from 10 mmolL to 50 mmolL. Ammonia and sulfur dioxide are reducing agents. But sulfur dioxide can turn potassium dichromate from orange to green but ammonia cannot.