Ch.22 - Chemistry of the Nonmetals
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Problem 37b,e
Write balanced equations for each of the following reactions.
b. When copper(II) nitrate is heated strongly, it decomposes to form copper(II) oxide, nitrogen dioxide, and oxygen.
e. Potassium peroxide reacts with CO2(g) to give potassium carbonate and O2.
- Complete the exercises below. Select the more acidic member of each of the following pairs: a. Mn₂O₇ and MnO₂, b. SnO and SnO₂, c. SO₂ and SO₃, d. SiO₂ and SO₂, e. Ga₂O₃ and In₂O₃, f. SO₂ and SeO₂.
Problem 4
- Complete the exercises below. Write the chemical formula for each of the following compounds, and indicate the oxidation state of nitrogen in each: a. nitric oxide, b. hydrazine, c. potassium cyanide, d. sodium nitrite, e. ammonium chloride, f. lithium nitride.
Problem 5
- Complete the exercises below. Account for the following observations: a. H₃PO₃ is a diprotic acid. b. Nitric acid is a strong acid, whereas phosphoric acid is weak. c. Phosphate rock is ineffective as a phosphate fertilizer. d. Phosphorus does not exist at room temperature as diatomic molecules, but nitrogen does. e. Solutions of Na₃PO₄ are quite basic.
Problem 6
Problem 8
Which property of the third-row nonmetallic elements might be the one depicted below:
a. first ionization energy,
b. atomic radius,
c. electronegativity,
d. melting point,
e. X―X single-bond enthalpy? [Find more in Sections 22.3, 22.4, 22.6, 22.8, and 22.10]
- Complete the exercises below. Identify each of the following elements as a metal, nonmetal, or metalloid: a. phosphorus, b. strontium, c. manganese, d. selenium, e. sodium, f. krypton.
Problem 11
- Complete the exercises below. Identify each of the following elements as a metal, nonmetal, or metalloid: a. gallium, b. molybdenum, c. tellurium, d. arsenic, e. xenon, f. ruthenium.
Problem 12
- Complete the exercises below. Consider the elements O, Ba, Co, Be, Br, and Se. From this list, select the element that: a. is most electronegative, b. exhibits a maximum oxidation state of +7, c. loses an electron most readily, d. forms π bonds most readily, e. is a transition metal, f. is a liquid at room temperature and pressure.
Problem 13
- Complete the exercises below. Consider the elements Li, K, Cl, C, Ne, and Ar. From this list, select the element that a. is most electronegative, b. has the greatest metallic character, c. most readily forms a positive ion, d. has the smallest atomic radius, e. forms π bonds most readily, f. has multiple allotropes.
Problem 14
- Complete the exercises below. Which of the following statements are true? a. Both nitrogen and phosphorus can form a pentafluoride compound. b. Although CO is a well-known compound, SiO does not exist under ordinary conditions. c. Cl₂ is easier to oxidize than I₂. d. At room temperature, the stable form of oxygen is O₂, whereas that of sulfur is S₈.
Problem 15
- Complete the exercises below. Which of the following statements are true? a. Si can form an ion with six fluorine atoms, SiF₆²⁻, whereas carbon cannot. b. Si can form three stable compounds containing two Si atoms each, Si₂H₂, Si₂H₄, and Si₂H₆. c. In HNO₃ and H₃PO₄, the central atoms, N and P, have different oxidation states. d. S is more electronegative than Se.
Problem 16
- Complete the exercises below. Complete and balance the following equations: a. NaOCH₃ (s) + H₂O (l) →
Problem 17
- Complete the exercises below. Complete and balance the following equation: a. Mg₃N₂ (s) + H₂O (l) →
Problem 18
- Complete the exercises below. Complete and balance the following equation: b. C₃H₇OH (l) + O₂ (g) →
Problem 18
- Complete the exercises below. Complete and balance the following equation: e. Na₂S (s) + HCl (aq) →
Problem 18
- Complete the exercises below. a. Give the names and chemical symbols for the three isotopes of hydrogen. b. List the isotopes in order of decreasing natural abundance. c. Which hydrogen isotope is radioactive? d. Write the nuclear equation for the radioactive decay of this isotope.
Problem 19
- Give a reason why hydrogen might be placed along with the Group 1A elements of the periodic table.
Problem 21
- What does hydrogen have in common with the halogens? Explain.
Problem 22
- Complete the exercises below. Complete and balance the following equation: b. Fe (s) + H₂SO₄ (aq) →
Problem 23
- Complete the exercises below. Write balanced equations for each of the following reactions: a. Aluminum metal reacts with acids to form hydrogen gas. b. Steam reacts with magnesium metal to give magnesium oxide and hydrogen. c. Manganese(IV) oxide is reduced to manganese(II) oxide by hydrogen gas. d. Calcium hydride reacts with water to generate hydrogen gas.
Problem 24
- Complete the exercises below. Identify the following hydrides as ionic, metallic, or molecular: a. BaH₂, b. H₂Te, c. TiH₁.₇.
Problem 25
- Complete the exercises below. Identify the following hydrides as ionic, metallic, or molecular: a. B₂H₆, b. RbH, c. Th₄H₁.₅.
Problem 26
- Complete the exercises below: Describe two characteristics of hydrogen that are favorable for its use as a general energy source in vehicles.
Problem 27
- Complete the exercises below. The H₂/O₂ fuel cell converts elemental hydrogen and oxygen into water, producing, theoretically, 1.23 V. What is the most sustainable way to obtain hydrogen to run a large number of fuel cells? Explain.
Problem 28
- Complete the exercises below: Why does xenon form stable compounds with fluorine, whereas argon does not?
Problem 29
- Complete the exercises below. Write the chemical formula for each of the following, and indicate the oxidation state of the halogen or noble-gas atom in each: a. calcium hypobromite, b. bromic acid, c. xenon trioxide, d. perchlorate ion, e. iodous acid, f. iodine pentafluoride.
Problem 31
- Complete the exercises below. Write the chemical formula for each of the following compounds, and indicate the oxidation state of the halogen or noble-gas atom in each: a. chlorate ion, b. hydroiodic acid, c. iodine trichloride, d. sodium hypochlorite, e. perchloric acid, f. xenon tetrafluoride.
Problem 32
- Complete the exercises below. Name the following compounds and assign oxidation states to the halogens in them: a. Fe(ClO₃)₃
Problem 33
- Complete the exercises below. Name the following compounds and assign oxidation states to the halogens in them: a. KClO₃, b. Ca(IO₃)₂.
Problem 34
Problem 35c
Explain each of the following observations:
c. The boiling point of HF is much higher than those of the other hydrogen halides.
