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Table 2 Maxima and minima of pH value in the conducted experiments, comparison of measured and modeled values

From: Quantification of the effect of gas–water–equilibria on carbonate precipitation

 

pH maximum

Within time, /min

pH minimum

Within time, /min

\({\hbox {CO}}_{2}\) stripping from air

    

Tap water

    

First run—measured

8.66

1000

8.22

2470

First run—modeled

8.73

901

8.16

1760

Subsequent run—measured

8.41

233

8.31

778

Subsequent run—modeled

8.40

242

8.32

802

I = \({1.40\times 10^{-2}}\)mol/L

    

First run—measured

8.83

1530

8.29

2410

First run—modeled

8.79

1030

8.32

2720

Subsequent run—measured

8.61

364

8.36

697

Subsequent run—modeled

8.62

262

8.36

886

Dissolution of \({\hbox {CaCO}}_{3}\) with \({\hbox {CO}}_{2}\)

    

Tap water

    

First run—measured

5.55

40.0

First run—modeled

5.53

74.0

Subsequent run—measured

5.65

64.0

Subsequent run—modeled

5.58

50.0