Volume of the STOCK aliquot (ml)

Final preparation

Calculated pH

Solution C₆H₈O₇

Solution Na₃C₆H₅O₇

Final volume buffer (ml)

Concentration buffer (M)

Obtained pH

3.83

5

25

50

0.12

5.40

3.35

15

25

50

0.16

4.37

3.13

15

15

50

0.12

3.83

2.83

30

15

50

0.18

3.05

2.43

25

5

50

0.12

2.30