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CHM 112
Section 1

Homework Assignment #1
Due January 25, 2006 by 8:05 a.m.

The first portion of this assignment is concerned with nomenclature of ions we will encounter in the course. You MUST know the names, formulas, and charges of all of these ions from here on.

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A. Give chemical formulas for the following ions:

0) chlorite ion

1) chlorate ion

2) perchlorate ion

3) chromate ion

4) dichromate ion

5) cyanate ion

6) thiocyanate ion

7) oxalate ion

8) hydrogen phosphate ion

9) dihydrogen phosphate ion

B. Write the names for the following ions (spelling counts and every correct answer requires two words):

0) C2H3O2

1) CO32–

2) HCO3

3) CN

4) NO2

5) NO3

6) MnO4

7) PO43–

8) SO32–

9) SO42–

C. The following questions concern periodic properties, which are key to understanding chemical reactivity. Answer:

0) For B, C, N, O, and F, which has the largest ionization energy? Briefly explain.

1) For B, C, N, O, and F, which has the largest radius? Briefly explain.

2) For B, C, N, O, and F, which has the largest electron affinity? Briefly explain.

3) For B, C, N, O, and F, which has the largest electronegativity? Briefly explain.

4) For Na, K, Rb, and Cs, which has the largest ionization energy? Briefly explain.

5) For Na, K, Rb, and Cs, which has the largest radius? Briefly explain.

6) For Na, K, Rb, and Cs, which has the largest electron affinity? Briefly explain.

7) For Na, K, Rb, and Cs, which has the largest electronegativity? Briefly explain.

8) For F, Cl, Br, and I, which has the largest ionization energy? Briefly explain.

9) For F, Cl, Br, and I, which has the largest radius? Briefly explain.

D. The following reactions can easily be balanced by inspection. Note that the phase of matter is given for all reactions. In CHM 112, keeping track of the phase of matter in reactions is important. Thus, in all reaction that you write for this class you must include the phase of matter for all components to get full credit. Do not use fractions as stoichiometric coefficients. Balance:

0) Cl2O5(g) + H2O(l)HClO3(aq)

1) V2O5(s) + H2(g)V2O3(s) + H2O(l)

2) Al(s) + O2(g)Al2O3(s)

3) TiCl4(l) + H2O(l)TiO2(s) + HCl(aq)

4) Sn(s) + NaOH(aq)Na2SnO2(s) + H2(g)

5) PCl5(g) + H2O(l)H3PO4(aq) + HCl(aq)

6) CH3SH(g) + O2(g)CO2(g) + SO2(g) + H2O(l)

7) Zn(OH)2(s) + H3PO4(l)Zn3(PO4)2(s) + H2O(l)

8) CH3CH2OH(l) + PCl3(g)CH3CH2Cl(l) + H3PO3(s)

9) WO3(s) + H2(g)W(s) + H2O(l)



Turn in the following on a clean, full sheet of paper (not torn out of a notebook):

Name (legibly written)
Student ID Number
From Group A, answer the question that matches the last digit of your Student ID Number
From Group B, answer the question that matches the eighth digit of your Student ID Number
From Group C, answer the question that matches the seventh digit of your Student ID Number
From Group D, answer the question that matches the sixth digit of your Student ID Number