F10Q11W14 - CHEM 0110 QUIZ 11 WEEK 14 MONDAY 1:00 PM NAME 1...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
CHEM 0110 QUIZ 11 WEEK 14 MONDAY, 1:00 PM November 29, 2010 NAME_______________________________________________________________________ 1. a) Draw the Lewis structure for NH 3 . b) Give the electron arrangement around the N atom. c) Give the molecular geometry around the N atom. d) Is the NH 3 molecule polar or nonpolar? Give your reasoning. 2. Describe what is meant by a π (pi) bond. Include at least two important properties of a pi bond. ANSWERS 1a) N H H H b) Tetrahedral c) Trigonal pyramidal d) Polar. The N end of the molecule has a partial (-) charge and the H end has a partial (+) charge. 2. Give full credit for any two valid properties, such as the following Multiple bonds consist of one σ (sigma) bond and one or two π (pi) bonds. A pi bond is formed by the sideways overlap of two p orbitals, one on each of the bonding atoms. A pi bond has electron density in two lobes on opposite sides of the internuclear axis, but no electron density on that axis. A pi bond contains two electrons For Make-up Only Regular recitation Day: Time: instructor: Quiz Score: Group score: Scores recorded by:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CHEM 0110 QUIZ 11 WEEK 14 MONDAY, 6:00 PM November 29, 2010 NAME_______________________________________________________________________ 1. A compound with molecular formula C 4 H 6 has two C atoms with sp hybridization and two C atoms with sp 3 hybridization. Draw a valid Lewis structure of a molecule that has these properties. 2. State the molecular geometry of CO 2 3. State whether each of the following molecules is polar or non-polar - give your reasoning. O 2 CO CO 2 ANSWERS 1. H C C C C H H H H H OR H C C C C H H H H H 2. Linear 3. O 2 : Non-polar by symmetry CO: polar, because the bond is polar. CO 2 . Non-polar: the two bond dipoles act in opposite directions and cancel. For Make-up Only Regular recitation Day: Time: instructor: Quiz Score: Group score: Scores recorded by:
Background image of page 2
CHEM 0110 QUIZ 11 WEEK 14 TUESDAY, 8:00 AM November 30, 2010 NAME_______________________________________________________________________ 1. In the sulfite ion, SO 3 2- , the electron arrangement around the S atom is not the same as the molecular geometry. a) Draw the Lewis structure for SO 3 2- b) Give the name for the electron arrangement around the S atom. c) Give the name for the molecular geometry around the S atom. 2. State the number of sigma ( σ ) and pi ( π ) bonds in the following structure. H C C H H C H ANSWERS 1a) O S O O [ ] 2- (or with three single bonds) 1b) Tetrahedral (4 electron groups) 1c) Trigonal pyramidal 2. 6 sigma and 2 pi bonds For Make-up Only Regular recitation Day: Time: instructor: Quiz Score: Group score: Scores recorded by:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CHEM 0110 QUIZ 11 WEEK 14 TUESDAY, 1:00 PM November 30, 2010 NAME_______________________________________________________________________ 1. For the species NH 4 + : a) Draw a Lewis structure for the NH 4 + ion. b) What is the name of the molecular geometry of NH
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/20/2011 for the course CHEM 110 taught by Professor Dr.huston during the Spring '06 term at Pittsburgh.

Page1 / 12

F10Q11W14 - CHEM 0110 QUIZ 11 WEEK 14 MONDAY 1:00 PM NAME 1...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online