Give the major product(s). OH PBr3 1. 2. OH HCI

Consider the properties of sodium carbonate (Na2CO3), potassium carbonate (K2CO3), andsodium hydroxide (NaOH). How do they differ by pKa? Nucleophilicity? Solubility?

The isoelectric point (pl) of phenylalanine is pH 5.5. Draw the structure of the major form of glutamic acid at pH values of (a) 1 (b) 5.5 (c) 11.0.

What products are formed when mCPBA reacts with the following compound. Indicate which is the major product

1a) Biotin has a single ionizable group with a pKa of 4.5. If you dissolved biotin in an aqueous solution at pH 7.0, would this ionizable group be protonated or deprotonated? Briefly explain why the molecule would be in that form at pH 7.0.

Would 7b show stereochemistry? It looks like it has 2 chiral centers.

Arrange the following forms of cyanide from least toxic to most toxic:a. SCNb. HCNc. CNO-d. CN-

What fraction of ethane -1,2-dithiol is in the form (A2-) at pH 8.00? Ka1 = 1.41 × 10-9 and Ka2 = 3.72 x 10-11   A) 0.124 B) 0.876 C) 4.6 × 10-4 D) 0.690

iso-butylchloride with CH3COONa

Would this be H2O/H2SO4??