Homework Answers
Lattice energy is inversely proportional to the inter ionic distance. So, when the interionic distance is decreased the lattice energy will be decreased. The ionic radius of K+, Na+, Cs+ and Li+ decreases in the order Cs+ > K+ > Na+ > Li+. So, the interionic distance will decrease in the order CsI > KI > NaI > Li. Hence, the increasing order of lattice energy is:
CsI < KI < NaI < LiI
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1. The relationship between lattice energy (U) of an ionic-solids is explained pictorially bellow. Using this...
PART B: TRENDS IN ATOMIC PROPERTIES Use your graphs to answer the following questions. 1. State the general periodic relationship between the physical property and increasing atomic number within...
PART B: TRENDS IN ATOMIC PROPERTIES Use your graphs to answer the following questions. 1. State the general periodic relationship between the physical property and increasing atomic number within a period of elements. a) lonization energy b) Atomic radius c) Electronegativity 2. State the general periodic relationship between the physical property and increasing atomic number within a group of elements. a) lonization energy b) Atomic radius c) Electronegativity
PART B: TRENDS IN ATOMIC PROPERTIES Use your graphs to answer the...
Calculate the lattice energy of lithium iodide, using both the Born–Landé and the Kapustinskii equations. Compare...
Calculate the lattice energy of lithium iodide, using both the
Born–Landé and the Kapustinskii equations. Compare these values
with those found in Table 8.3.
TABLE 8.3 Thermochemical Data and Lattice Energies for Alkali-Metal Halides AH, 298 AHSub" IE AH EA UB-H UB-L diff." Ulan LIF - 968 -886 - 784 7.5 4.5 5.1 5.1 - 960 - 873 - 774 NaF KF REF CsF - 752 -- 741 -709 4.3 LiCI 1 59.4 107.3 89.2 80.9 76.1 159.4 107.3 89.2...
2. (40 pts) Provide short answers for the following questions. 1) List ionic compounds KBr, CaO,...
2. (40 pts) Provide short answers for the following questions. 1) List ionic compounds KBr, CaO, KCl, and Sro: in order of increasing magnitude of lattice energy: in order of decreasing melting point: 2) The first four ionization energies for the elements X and Y are shown in a table below. Predict the elements X and Y. There may be more than one correct answer, so explain completely. The units are not kJ/mol. IE 170 200 IE2 350 400 IE:...
1. For each compound given here, write what type of compound it is (molecular or ionic...
1. For each compound given here, write what type of compound it is (molecular or ionic or acid). (a) NH4Cl (b) AlH3 (c) O2 (d) CH4 (e) NH3 (f) H2O (g) PCl5 (h) SF4 (I) ClF3 (j) XeF2 (k) SF6 (l) BrF5 (m) XeF4 (o) CS2 (p) CH2Cl2 2. Write a chemical equation that goes with Lattice energy of CaCl2(s). 3. Draw the Lewis Dot structure of .. (a) Na (b) Cl (c) O-2 (d) Mg+2 4. What is the...
1. Which one of the following is most likely to be an ionic compound? A) CaCl2...
1. Which one of the following is most likely to be an ionic compound? A) CaCl2 B) CO2 C) CS2 D) SO2 E) OF2 2. Which one of the following ionic solids would have the largest lattice energy? A) NaCl B) NaF C) CaBr2 D) CsI E) CaCl2 3. Calculate the energy change for the reaction K(g) + I(g) → K+(g) + I – (g) given the following ionization energy (IE) and electron affinity (EA) values. IE K: 419 kJ/mol...
Consider the reaction of sodium metal with chlorine gas to from NaCl as shown below. How...
Consider the reaction of sodium metal with chlorine gas to from NaCl as shown below. How does each elements in the compounds NaCl attain an octet of electrons? 2 Na(s) + Cl_2 rightarrow 2 NaCl(s) A sodium atom and a chlorine atom share two electrons. A sodium atom loses an electron and the chlorine atom accepts the electron. A chlorine atom loses an electron and the sodium atom accepts the electron. A sodium atom loses an electron and the chlorine...
Material Science Help 1. Select the element in the periodic table that is commonly used as...
Material Science Help 1. Select the element in the periodic table that is commonly used as an n-type dopant in a silicon semiconductor: a. C b. B c. P d. O 2. The compound with the smallest cation is: a. AuCl b. CaF2 c. ScCl3 d. LiBr 3. The percentage ionic character of MgO is: a. 73 b. 68 c. 81 d. 27 4. The expression for the volume of a unit cell in a BCC crystalline structure is: a....
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
1. Which of the following are the sites within the human body where carbon dioxide and...
1. Which of the following are the sites within the human body where carbon dioxide and oxygen are exchanged? A. Alveoli B. Arteries C. Synapses D. Venules 2. Which of the following describes the most important reason for repeating an experimental investigation? A. To verify the validity of the original findings B. To expand upon the original investigation C. To manipulate the independent variable D. To attempt to disprove the hypothesis 3. Lithium has an atomic number of 3 and...
PART B: TRENDS IN ATOMIC PROPERTIES Use your graphs to answer the following questions. 1. State the general periodic relationship between the physical property and increasing atomic number within a period of elements. a) lonization energy b) Atomic radius c) Electronegativity 2. State the general periodic relationship between the physical property and increasing atomic number within a group of elements. a) lonization energy b) Atomic radius c) Electronegativity
PART B: TRENDS IN ATOMIC PROPERTIES Use your graphs to answer the...
Calculate the lattice energy of lithium iodide, using both the
Born–Landé and the Kapustinskii equations. Compare these values
with those found in Table 8.3.
TABLE 8.3 Thermochemical Data and Lattice Energies for Alkali-Metal Halides AH, 298 AHSub" IE AH EA UB-H UB-L diff." Ulan LIF - 968 -886 - 784 7.5 4.5 5.1 5.1 - 960 - 873 - 774 NaF KF REF CsF - 752 -- 741 -709 4.3 LiCI 1 59.4 107.3 89.2 80.9 76.1 159.4 107.3 89.2...
2. (40 pts) Provide short answers for the following questions. 1) List ionic compounds KBr, CaO, KCl, and Sro: in order of increasing magnitude of lattice energy: in order of decreasing melting point: 2) The first four ionization energies for the elements X and Y are shown in a table below. Predict the elements X and Y. There may be more than one correct answer, so explain completely. The units are not kJ/mol. IE 170 200 IE2 350 400 IE:...
Consider the reaction of sodium metal with chlorine gas to from NaCl as shown below. How does each elements in the compounds NaCl attain an octet of electrons? 2 Na(s) + Cl_2 rightarrow 2 NaCl(s) A sodium atom and a chlorine atom share two electrons. A sodium atom loses an electron and the chlorine atom accepts the electron. A chlorine atom loses an electron and the sodium atom accepts the electron. A sodium atom loses an electron and the chlorine...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
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