Hydrochloric Acid concentration (M)

Maximum absorbance Wavelength λ_max (nm)

Optical energy band gap (E_g)

Eubach energy (E_u) (eV)

Weak absorption tail E_t (eV)

1.0

279.667

3.7567

0.2642

2.3632

1.5

281.3584

3.6887

0.2824

3.6448

2.0

282.50

3.5700

0.3537

5.1838

2.5

283.598

3.4964

0.3795

7.0472