pH

0.2mol/L NaH₂PO₄(ml)

0.2mol/L Na₂HPO₄(ml)

5.7

93.5

6.5

5.8

92.0

8.0

5.9

90.0

10.0

6.0

87.7

12.3

6.1

85.0

15.0

6.2

81.5

18.5

6.3

77.5

22.5

6.4

73.5

26.5

6.5

68.5

31.5

6.6

62.5

37.5

6.7

56.5

43.5

6.8

51.0

49.0

6.9

45.0

55.0

7.0

39.0

61.0

7.1

33.0

67.0

7.2

28.0

72.0

7.3

23.0

67.0

7.4

19.0

81.0

7.5

16.0

84.0

7.6

13.0

87.0

7.7

10.5

89.5

7.8

8.5

91.5

7.9

7.0

93.0

8.0

5.3

94.7