A. at what ph are about 1/2 of the carboxyl groups ionized? ph = b. where does the amino acid have a net charge of +1? below ph 2.34 at ph = 2.34 at ph = 6.01 at ph = 9.69 above ph 9.69 c. at what point has enough base been added to react with 1/2 of the cooh groups? 1/2 of cooh reacted = equivalents oh− when 1/2 of cooh has reacted, the ph = d. at which ph value does the amino acid have the best buffering capacity? 1.53 10.5 2.34 6.01 3.00 9.00 e. what is the pi (isoelectric point)? pi =

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o

diaria maybe go see a doctor about that