Question

Please answer these post lab questions correctly, ASAP.

Aldehyde and Ketone Group No. and Members: Section: Date: POST-LAB GUIDE QUESTIONS 1) How does formaldehyde act as disinfectant or as a preservative of biological specimens? 2) What are the uses of urotropine? Give its structure. Explain the action of each. 3) is the use of HCHO as a food preservative permitted by law? Explain. 4) Give the practical use of the reduction of AgNO3 by means of aldehydes. 5) What is paraldehyde? Give one use of paraldehyde in medicine. 6) Give the commercial use of acetone. 7) What is the presence of acetone in urine and breath an indication of? 8) What is meant by autooxidation? 9) Formaldehyde undergoes addition reactions more readily than all of other aldehyde, Explain why. 10) Predict the products formed when aldehydes and ketones undergo aldol condensation. Complete the equation below and provide a name to the products formed.

These are the data sheets. Thank you!

Answer 1

1) Formaldehyde denaturates cell proteins making them unsuitable for bacteria.

2) Urotropine is used for urinary tract infections because it decomposes to ammonia and formaldehyde.

3) Its use is not legal, formaldehyde is a human carcinogen and it can also cause burns.

4) It serves as a test to differentiate aldehydes from ketones, the formation of a silver mirror indicates the presence of an aldehyde.

5) Paraldehyde is the ciclic trimer of acetaldehyde, it is used as a sedative and in the treatment of convulsions.

6) Acetone is mainly used as a solvent but also to produce methyl methacrylate.

7) The presence of acetone may indicate diabetic ketoacidosis, a complication of diabetes mellitus.

8) Autooxidation is an oxidation reaction that initiates in the presence of oxygen but can me maintained by the molecule being oxidated through its products (free radicals).

9) As formaldehyde doesn't have any substituents to help to improve its stability, it reacts readily with nucleophiles to form addition products.