HW9answers - Cheung, Anthony – Homework 9 – Due: Nov 6...

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Unformatted text preview: Cheung, Anthony – Homework 9 – Due: Nov 6 2006, 5:00 pm – Inst: McCord 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. See Figure 1.43 (p 38) in your book for Ionic Radii. 001 (part 1 of 1) 10 points Which of the following cations is likely to be hydrated in compounds? 1. Rb + 2. Li + correct 3. Cs + 4. K + 5. NH + 4 Explanation: Li + is the smallest. 002 (part 1 of 1) 10 points Which of the following compounds is UN- LIKELY to be commonly available and thus not found in the laboratory? 1. La(NO 3 ) 3 · 6HO 2. Na 2 CO 3 · 10H 2 O 3. CuSO 4 · 5H 2 O 4. BaCl 2 · 2H 2 O 5. KCN · 2H 2 O correct Explanation: K + is only a +1 cation AND it is too large to substantially attract waters of hydration. +2 and +3 cations will generally form hydrates. Na + will also attract water due to its smaller size. 003 (part 1 of 1) 10 points Identify the kinds of intermolecular forces that might arise between molecules of CI 4 . 1. hydrogen bonding 2. London forces, dipole-dipole 3. dipole-dipole 4. London forces, dipole-dipole, hydrogen bonding 5. London forces correct 6. None of these Explanation: C I I I I is non-polar. 004 (part 1 of 1) 10 points Which of HCl or NaCl is likely to have the higher normal boiling point? 1. They are same 2. HCl 3. NaCl correct Explanation: NaCl; it is an ionic compound as opposed to the molecular compound HCl (801 ◦ C for NaCl vs.- 114 . 8 ◦ C for HCl)....
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This note was uploaded on 11/11/2010 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas.

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HW9answers - Cheung, Anthony – Homework 9 – Due: Nov 6...

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