Chemistry 151 and 152
General Chemistry

Fall 2004 / Spring 2005

Errata in Textbook (3rd edition)

Page 11, under subtopic "Arrangement":
Technically, the periodic table lists the elements in numerical order according to atomic number (or proton number), and not according to mass (light to heavy). While it is generally true that they go from less to more massive, there are a few instances following natural abundances where this is not true. See for example the masses of Ar and K, or Te and I.

Page 48, 2nd paragraph, 8th line:
The droplets are not irradiated with X-rays. If they were, they would be positively charged. The chamber was illuminated with X-rays causing the air to ionize and "electrons" to attach themselves to the oil drops. That is why the droplets are negatively charged.

Pages 306 and 312, i.e. Figures 7-16 and 7-19:
The atomic sizes in Figure 7-16 are not measured the same way as the ionic sizes in Figure 7-19. These numbers are not directly comparable because they have different definitions of size.

Bottom of page 309:
Second last line. IE should be 1681 kJ/mol and not 168.

The answer to the section exercise 7.5.1, given at the end of the chapter, is wrong. It should be -2969 kJ/mole given the information in the question.

Pages 452 and 453
Figure 10-23 should have an anion in the center of the (fcc) cube in both pictures. Figure 10-26 is technically not iron because the edge spheres would not be able to "touch" each other if the center sphere is the same radius as the edge spheres.

Pages 558 and 559
To be consistent with the sign convention, it is better to use -q(electric) in the equation at the bottom of p558 and to realize that q(electric) is a negative number by sign convention. The result is the same, i.e., that C(cal) is a positive number. The same applies to steps 3 and 5 in Example 12-5 on p559. Page 649, last paragraph
Text argues that in Mechanism II, the first step is the slow step it produces NO3 which has an odd number of electrons. This is a weak argument because NO and NO2 all have an odd number of electrons. Comparing the two steps in Mechanism II, step 1 is probably slower because it requires the collision of two NO2 molecules.

Page 842, in Example 17-16
Wrong exponents: all the 3.5 x 10^(-3) should be 3.5 x 10^(-2). This means that y and hence [Au+] = 1 x 10^(-38).


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Last modified: 14 January 2004