85. Write the reaction and the corresponding K, equilibrium expression for each of the following substances acting as bases in water. a. NH, b. C,H,N Name Ammonia Methylamine Ethylamine Aniline Pyridine Formula NH₂ CH3NH₂ CHINH, CH5NH2 C₂H₂N Conjugate Acid NH₁ CH3NH₂+ C,HẠNH, * C6H5NH3+ CHẠNH* K₂ 1.8 x 10-5 4.38 x 10-4 5.6 x 10-4 3.8 x 10-10 1.7 X 10-9

2. What type of chemical reaction is illustrated by the following reaction? CH3OOCH3 + H2O ⎯→ CH3OOH + CH3OH a. oxidation/reduction b. substitution c. neutralization d. hydrolysis e. dehydration synthesis (condensation)

Q1. Please draw correct structures of given molecules a. e. 2-amino-3-sulfanylpropanoic acid 2-aminohexan-3-ol 5-hydroxy-3,4-dimethylheptan-2-one b. d. f. 2-aminopropanoic acid (3Z)-5-hydroxyhept-3-en-2-one 5-hydroxycyclohexa-2,4-dien-l-one 02. Please identify chiral centers in the hypotetical molecule given below properly and

5 In the condensation reaction used in Part B, the water molecule is produced when a -OH from the carboxylic acid functional group in one molecule bonds to the proton of an alcohol functional group in the other molecule. Consider the two molecules below and answer the questions that follow. OH HO H₂SO4 a. Circle the -OH of the carboxylic acid group and the proton of the alcohol that combine to form H₂O. b. Recall that oxygen generally participates in two bonds and carbon participates in four. Draw a dotted line between the two atoms in the organic molecules that must bind to each other in order to maintain the typical bonding numbe for all atoms if the circled elements of the H₂O molecule separate from the reactants. c. In the box provided, draw the product formed by bonding the atoms connected by your dotted line.

1.Describe the difterences you wo conducting the Nitrous Acid' test on aniline rs. 1ou would see when amine.Be specific.