Why is the Benedict reagent alkaline? Write down the chemical equation describing the reaction that has...
Why is the Benedict reagent alkaline? Write down the chemical equation describing the reaction that has occurred.
Homework Answers
Benedict's solution is prepared by copper (II) Sulphate, Sodium Carbonate , Sodium Citrate. Alkaline environment is provided due to the presence of sodium carbonate and the alkaline environment is given to favor the presence of the free aldehyde form by suppressing ring formation as because If the sugar exist in the ring form it can not react.
Reaction :
H-C(R)=O (Sugar) + 2Cu2+ + 5OH- (Benedict Reagent)= HO-C(R)=O (Carboxylic Acid) + Cu2O (copper I oxide) +3H2O
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Why is the Benedict reagent alkaline? Write down the chemical
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QUESTIONS: 1. When a reducing sugar reacts with Benedict reagent, what organic product is formed besides Cu20? Why is the formation of Cu O significant in this test? 2. What chemical test is performed to indicate the completion of the hydrolysis of starch by acid?
Write a balanced chemical equation for each reaction. If no reaction occurred, write "N.R."): Magnesium and hydrochloric acid: Zine and hydrochloric acid: Copper and hydrochloric acid: 3. Metals reacting with a non-metal (oxygen); metal oxides reacting with water Write a balanced chemical equation for each reaction. Magnesium and oxygen: Calcium and oxygen What happened when magnesium oxide and calcium oxide were added to water containing phenol phthalein indicator? What differences, if any, did you observe? Turns basic Water turns Pince...
Study this chemical reaction: Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction. oxidation: reduction: 1つ
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Study this chemical reaction: Cu+C2 CuCl2 Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction. oxidation: reduction:
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