A-Level Biology OCR A
Solution Benedict's Method Qualitative Sugar Tested Reaction Brick
| Front |
What are the chemical used in the Benedict's test? Outline the method & the appearance of a negative/positive result. |
| Back |
Benedict's test
Substances used - Qualitative Benedict's solution (alkaline solution of copper(II)sulfate)
- Solution you are testing (reducing/non-reducing sugar)
Method - Sugar being tested must be in solution so that reducing sugar molecules can expose their aldehyde group in linear form
- Add qualitative benedicts solution in equal volume to sample being tested - reactants will be in excess so reaction will be complete
- Heat mixture to 80+ deg C - catalysing reaction
Results - Brick red precipitate - Cu2+ ions reduced to Cu+ - brick red color - positive result
- No color change - solution stays blue - negative result
|
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card:
Qualitative chemical define term test process determining present
Previous card:
Involved symbol hydroxide ions list biological process hydrolysis
Up to card list:
A-Level Biology OCR A