Amount of H₂SO₄

(in g/l): X₁

Amount of BaCO₃

(in g/l): X₂

Temperature (in ˚C): X₃

Time

(in mn): X₄

Y Obs. (in g/l)

Y Est.

(in g/l)

Residual

21.8

31

57

42.5

6.125

6.397

−0.272

21.8

16

74

25

12.740

12.666

0.074

23.2

27.5

57

42.5

9.065

9.007

0.058

29.4

20

74

25

18.620

18.464

0.156