acidity Coal NaOH
8.27 1 1
8.17 1 1
8.03 1 2
8.21 1 2
8.6 1 3
8.2 1 3
8.66 2 1
8.61 2 1
8.42 2 2
8.58 2 2
8.61 2 3
8.76 2 3
8.14 3 1
7.96 3 1
8.02 3 2
7.89 3 2
8.13 3 3
8.07 3 3
