8th Edition

ISBN: 9780135205068

Author: Robinson

Publisher: PEARSON

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Textbook Question

Chapter 6, Problem 6.20P

PROBLEM 6.19 An ionic liquid consisting of a bulky amine cation and chloride anion has a melting point of 41°C. For a green chemistry solvent application, it is desirable to have a melting point below room temperature (25 °C) so energy is not required to heat the compound. The melting point of the ionic liquid can be altered by replacing chloride with a different anion. The anion possibilities are:

F⁻, Se²⁻, O²⁻, and Br⁻.

(a) Write the electron configuration for each of these ions.

(b) Which ions are isoelectronic?

(c) Which ion is the best choice for replacing the chloride ion to make an ionic liquid with a lower melting temperature?

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Chapter 6, Problem 6.19P

Chapter 6, Problem 6.21CP

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Chapter 6 Solutions

CHEMISTRY-W/MASTERING CHEMISTRY ACCESS

Ch. 6 - Prob. 6.1P Ch. 6 - APPLY 6.2 Which of the following sets of ions are...Ch. 6 - Which atom or ion has the largest radius:...Ch. 6 - Conceptual APPLY 6.4 Which of the following...Ch. 6 - Use the periodic table to order the elements from...Ch. 6 - Given the orbital filling diagrams for the valence...Ch. 6 - Which has the largest third ionization energy: Be,...Ch. 6 - Conceptual APPLY 6.8 The figure on the right...Ch. 6 - Order the following elements from least to most...Ch. 6 - Conceptual APPLY 6.10 Which of the indicated three...

Ch. 6 - What electron configuration does the strontium...Ch. 6 - Prob. 6.12A Ch. 6 - Prob. 6.13P Ch. 6 - APPLY 6.14 Calculate the energy of electrostatic...Ch. 6 - Which substance has the largest lattice energy:...Ch. 6 - One of the following pictures represents NaCl and...Ch. 6 - Prob. 6.17P Ch. 6 - What structural features do ionic liquids havethat...Ch. 6 - PROBLEM 6.18 Compare the following two ionic...Ch. 6 - PROBLEM 6.19 An ionic liquid consisting of a bulky...Ch. 6 - Where on the periodic table would you find the...Ch. 6 - Which of the following spheres is likely to...Ch. 6 - Circle the approximate part or parts of the...Ch. 6 - Prob. 6.24CP Ch. 6 - This figure represents the successive ionization...Ch. 6 - In the following drawings, red spheres represent...Ch. 6 - Which of the following drawings is more likely to...Ch. 6 - Prob. 6.28CP Ch. 6 - Which of the following alkali metal halides has...Ch. 6 - Which of the following alkali metal halides has...Ch. 6 - Three binary compounds are represented on the...Ch. 6 - Prob. 6.32CP Ch. 6 - Prob. 6.33CP Ch. 6 - What is the difference between a covalent bond and...Ch. 6 - Prob. 6.35SP Ch. 6 - What is the difference between a molecule and an...Ch. 6 - Prob. 6.37SP Ch. 6 - How many protons and electrons are in each of the...Ch. 6 - What is the identity of the element X in the...Ch. 6 - Prob. 6.40SP Ch. 6 - Prob. 6.41SP Ch. 6 - Prob. 6.42SP Ch. 6 - Prob. 6.43SP Ch. 6 - What doubly positive ion has the following...Ch. 6 - Prob. 6.45SP Ch. 6 - Prob. 6.46SP Ch. 6 - Which element in the transition-metal series Sc...Ch. 6 - Prob. 6.48SP Ch. 6 - Prob. 6.49SP Ch. 6 - Order the following ions from smallest to largest:...Ch. 6 - Order the following ions from smallest to largest:...Ch. 6 - Which ion has a larger atomic radius, Cu+ or Cu2+...Ch. 6 - Which ion hasa larger atomic radius, Fe2+ or Fe3+...Ch. 6 - The following ions all have the same number of...Ch. 6 - Which of the ions Se2,F,O2 and Rb+ has the largest...Ch. 6 - Which group of elements in the periodic table has...Ch. 6 - Prob. 6.57SP Ch. 6 - Which element in each of the following sets has...Ch. 6 - Order the elements in each set from the smallest...Ch. 6 - (a) Which has the smaller second ionization...Ch. 6 - (a) Which has the smaller fourth ionization...Ch. 6 - Three atoms have the following electron...Ch. 6 - Three atoms have the following electron...Ch. 6 - The first four ionization energies in kJ/mol of a...Ch. 6 - The first four ionization energies in kJ/mol of a...Ch. 6 - Prob. 6.66SP Ch. 6 - Prob. 6.67SP Ch. 6 - Prob. 6.68SP Ch. 6 - Prob. 6.69SP Ch. 6 - Why is energy usually released when an electron is...Ch. 6 - Why does ionization energy increase regularly...Ch. 6 - No element has a negative second electron...Ch. 6 - Why does phosphorus have a less negative electron...Ch. 6 - Prob. 6.74SP Ch. 6 - What noble-gas configurations and charge are the...Ch. 6 - Each of the following pairs of elements will react...Ch. 6 - Each of the following pairs of elements will react...Ch. 6 - Element X reacts with element Y to give a product...Ch. 6 - Element X reacts with element Y to give a product...Ch. 6 - Calculate the energy change in kilojoules per mole...Ch. 6 - Prob. 6.81SP Ch. 6 - Find the lattice energy of LiBr(s) in Table 6.3,...Ch. 6 - Look up the lattice energies in Table 6.3, and...Ch. 6 - Born-4-Iaber cycles, such as those shown in...Ch. 6 - Calculate a lattice energy for CaH2(s) in...Ch. 6 - Calculate the overall energy change in kilojoules...Ch. 6 - The estimated lattice energy for CsF2(s) is +2347...Ch. 6 - Calculate the overall energy change in kilojoules...Ch. 6 - Use the data in Problem 6.88 to calculate an...Ch. 6 - Use the data and the result in Problem 6.84 to...Ch. 6 - Prob. 6.91SP Ch. 6 - Calculate overall energy changes in kilojoules per...Ch. 6 - Prob. 6.93SP Ch. 6 - We saw in Section 6.7 that the reaction of solid...Ch. 6 - Draw a Born—Haber cycle for the reaction of sodium...Ch. 6 - Use the following information plus the data given...Ch. 6 - Prob. 6.97SP Ch. 6 - Prob. 6.98SP Ch. 6 - Order the following compounds according to their...Ch. 6 - Prob. 6.100MP Ch. 6 - Heating elemental cesium and platinum together for...Ch. 6 - Given the following information, construct a...Ch. 6 - Consider the electronic structure of the element...Ch. 6 - Prob. 6.104MP Ch. 6 - The ionization energy of an atom can be measured...

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