1. Engineering
  2. Chemical Engineering
  3. calculate the molecular weight of the unknown amino acid with...

Question: calculate the molecular weight of the unknown amino acid with...

Question details

Calculate the molecular weight of the unknown amino acid with the titration results.

NaOH Concentration: 0.121M

Mass of Unknown Amino Acid: 0.199g

There were three possibilities of unknown amino acids in the lab.

Histidine (209.6g/mol)

Glycine (75g/mol)

Phenylalanine (165g/mol)

Amino Acid Titration 14 10 10 15 20 25 30 35 40 45 50 Volume of NaOH (mL)

Volume     pH
0 4.16
0.36 4.64
0.87 5.01
1.05 5.18
1.48 5.36
1.96 5.5
2.6 5.68
3.21 5.81
4.1 6.01
5.04 6.21
5.77 6.39
6.37 6.58
6.79 6.74
7.58 7.23
7.82 7.44
8 7.69
8.24 7.91
9.02 8.1
9.1 8.29
9.47 8.51
10.01 8.68
10.81 8.88
11.59 9.04
12.34 9.19
13.11 9.37
13.79 9.53
14.52 9.75
15.21 9.99
15.67 10.22
16 10.41
16.4 10.61
17.02 10.82
17.84 11.03
18.71 11.18
21 11.38
23.24 11.55
28.09 11.74
37.29 11.93
44.2 12.03
Solution by an expert tutor
Blurred Solution
This question has been solved
Subscribe to see this solution