CHEM 403L- Expt. 2 (Pre-lab)

Which of the following corresponds to the given GHS symbol?

• oxidizer

• toxic

• corrosive

• flammable

Which of the following corresponds to the given GHS symbol?

• toxic

• harmful

• oxidizer

• poison

Which of the following is an example of acidic amino acid?

• 
• 
• 
• 

Which of the following is an example of achiral amino acid?

• 
• 
• 
• 

Scenario:

An analyst aims to neutralize the given solution with a pH of 3.

Which of the following reagents is the most appropriate to use?

• NaCl

• distilled water

• NaOH

Proteins are made of amino acids.

What type of bond is formed when 2 amino acids are joined together?

• peptide bond

• glycosidic bond

• diester bond

• nitrogenous bond

What type of functional group is formed from the linking of 2 amino acid?

• amine

• diester

• amide

• carboxamine

At which pH will casein precipitate?

• 6.1

• 5.6

• 4.6

• 4.9

TRUE OR FALSE: At the pH of the milk solution, casein is positively charged.

• True

• False

• I don't know

• :)

What acid was added to precipitate out the casein from Experiment 1A?

• sulfuric acid

• hydrochloric acid

• acetic acid

• tartaric acid