Core practical 6 - testing for aldehydes and ketones Flashcards
(3 cards)
1
Q
What is step 1 in testing for aldehydes and ketones?
A
Add 1cm3 of unknown carbonyl compound to clean test tube - for controlled testing.
1
Q
What is step 2?
A
In a separate test tube prepare fresh Tollens’s reagent - reagent must be freshly prepared as it decomposes quickly can form explosive silver compounds
2
Q
What is step 3?
A
Add Tollens’ reagent to test tube with unknown and warm gently in hot bath - provides energy for redox a silver mirror forms if an aldehyde is present reduces to silver ion ketones give no reaction
