As part of an investigation into the presence of reducing sugars in food, a student tested glucose solution - Junior Cycle Science - Question h - 2016
Question h
As part of an investigation into the presence of reducing sugars in food, a student tested glucose solution.
(i) Name the chemical added to test for the presence ... show full transcript
Worked Solution & Example Answer:As part of an investigation into the presence of reducing sugars in food, a student tested glucose solution - Junior Cycle Science - Question h - 2016
Step 1
Name the chemical added to test for the presence of a reducing sugar.
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Answer
The chemical added to test for the presence of a reducing sugar is Benedict's solution or Fehling's solution.
Step 2
What other essential step should be taken?
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Answer
Another essential step to take is to heat the mixture; however, it is important not to allow it to boil.
Step 3
How would the solution change to indicate a positive result?
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A positive result would be indicated by a color change of the solution from blue to red or orange.
Step 4
Describe a control experiment that the student should use in this investigation.
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The student should test water or a solution that does not contain a reducing sugar. In this control experiment, no color change should be observed.
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