2007-06-01

Solutions of the theoretical problems corrected on June, 1 (minor corrections in the final section of problem 17)

2007-02-07

Experimental Problem 31, question 3:
Word "bromomalonic" was replaced by "iodomalonic".

Experimental Problem 34:

1. In section "Materials" the mass of buffer "2.42 g" was changed by "6.05 g".
2. In section "Apparatus" the phrase "one 100 mL volumetric flask" was replaced by "one 250 mL volumetric flask".
3. In section "Procedure. Step 1" the phrase "To prepare 0.2 M Tris buffer solution, dissolve 2.42 g of Tris in 100 mL of distilled water in the 100 mL volumetric flask." was replaced by "To prepare 0.2 M Tris buffer solution, dissolve 6.05 g of Tris in 250 mL of distilled water in the 250 mL volumetric flask.".

(Thanks to Jevgenijs Tjutrins, Student from University of Latvia)

2007-02-06

After the remark by Ernesto Verduzco from Mexico the misprint in theoretical problem 1 was corrected: "calcium-40" was replaced by "calcium-48".

In theoretical problem 4, question 3 the word "shortest" was replaced by "longest".
(Thanks to Joze Koller from Slovenia.)

2007-02-05

In theoretical problem 5, section 3 the data for benzene (surface tension and density) were corrected. This correction has a very small effect on the result of the calculation.