Uhmmm well yes there are acids present in soyabean, but not the corrosive kind like HCl. Soyabean contains amino acids which contain a carboxyl group and an amino group. There are numerous amino acids present in soyabean, they include;

1.Glutamic Acid (Glu)

2. Aspartic Acid (Asp)

3. Alanine (Ala)

4. Arginine (Arg)

5. Phenylalanine (Phe)

6. Glycine (Gly)

7. Histidine (His)

8. Isoleucine (Ile)

9. Leucine (Leu)

10. Lysine (Lys)

11. Methionine (Met)

12. Proline (Pro)

13. Serine (Ser)

14. Tyrosine (Tyr)

15. Threonine (Thr)

16. Valine (Val)

17. Crude Protein (CP)