pH

0.2mol/L Na2CO3(ml)

0.2mol/L NaHCO3(ml)

9.2

4.0

46.0

9.3

7.5

42.5

9.4

9.5

40.5

9.5

13.0

37.0

9.6

16.0

34.0

9.7

19.5

30.5

9.8

22.0

28.0

9.9

25.0

25.0

10.0

27.5

22.5

10.1

30.0

20.0

10.2

33.0

17.0

10.3

35.5

14.5

10.4

38.5

11.5

10.5

40.5

9.5

10.6

42.5

7.5

10.7

45.0

5.0