Experiment
Medium
Initial pH
Final pH
[Ca
2+
]
(mg/l)
1
Chalk + bacteria solution
6.80
6.15
354.8
2
Chalk + demineralized water
6.34
6.30
3.12
3
Bacteria solution without chalk sample
6.80
5.12
9.43
Table 5:
Comparison of chalk dissolution in bacteria medium and demineralized water.
