Showing posts with label CHEM 238. Show all posts
Showing posts with label CHEM 238. Show all posts

There are several chemical classification tests that can discern the difference between aldehydes and ketones, and also provide partial structure determination. Identify the components of the iodoform test reagent by dragging the reagent labels into the box.

There are several chemical classification tests that can discern the difference between aldehydes and ketones, and also provide partial structure determination. Identify the components of the iodoform test reagent by dragging the reagent labels into the box.



Answer:


  • Sodium hydroxide
  • Potassium Iodide
  • Iodine

The nitrating mixture of concentrated nitric and sulfuric acids is very corrosive. Nitric acid will burn and stain your skin yellow, while sulfuric acid will cause serious dehydrating tissue damage. Which of the following actions should you follow if you spill the nitrating mix on your jeans?

The nitrating mixture of concentrated nitric and sulfuric acids is very corrosive. Nitric acid will burn and stain your skin yellow, while sulfuric acid will cause serious dehydrating tissue damage. Which of the following actions should you follow if you spill the nitrating mix on your jeans?



Answer: Proceed immediately to the safety shower

There are several chemical classification tests that can discern the difference between aldehydes and ketones, and also provide partial structure determination. Identify the components of the Schiff's test reagent by dragging the reagent labels into the box.

There are several chemical classification tests that can discern the difference between aldehydes and ketones, and also provide partial structure determination. Identify the components of the Schiff's test reagent by dragging the reagent labels into the box.



Answer:

sodium bisulfite
rosaniline hydrochloride

The use of rinse acetone to remove traces of water from glassware is a very common laboratory technique. When performing qualitative tests in glass test tubes, such as Iodoform test or dinitrophenylhydrazine test, why should you avoid rinsing the glassware with acetone prior this experiment?

The use of rinse acetone to remove traces of water from glassware is a very common laboratory technique. When performing qualitative tests in glass test tubes, such as Iodoform test or dinitrophenylhydrazine test, why should you avoid rinsing the glassware with acetone prior this experiment?



Answer: It will give a false positive for some carbonyl classification tests.